GB 19041-2003 Safety regulations for the production of phosgene and phosgenation products

This standard specifies the safety requirements for the production of phosgene and phosgenation products and the design of production equipment. This standard applies to the new construction, expansion and reconstruction of phosgene and phosgenation product production equipment. GB 19041-2003 Safety regulations for the production of phosgene and phosgenation products GB19041-2003 standard download decompression password: www.bzxz.net

GB19041—2003
This standard is formulated on the basis of the labor and labor safety industry standard 1.31-1993 Safety regulations for the production of phosgene and phosgenation products. Compared with GB19041—2003, the main changes are to further classify and clarify the safety requirements for production and design: list the minimum safety protection distances that should be maintained for phosgene and phosgenation equipment in different specifications; delete the provisions that are repeated with the existing national standards; emphasize the scientific safety management procedures before and during the prevention of major accidents; simplify the provisions of conventional equipment; list the mandatory safety equipment tables; remove the duplicated Appendix A and Appendix B of the original standardwww.bzxz.net
Appendix A of this standard is an informative appendix.
This standard is proposed by the National Safety Supervision Commission. This standard was issued by the Chemical Safety Professional Committee of the Chemical Industry Society of China. The responsible unit for the drafting of this standard is the Second Chemical Industry Design Institute. The main drafters of this standard are: Xu Zulong, Liang Shaowei, Fang Shibo, Lai Zai, Yao Guoping, Bao Huandu. I
1 Safety Regulations for the Production of Phosgene and Phosgenation Products This standard specifies the safety requirements for the production of phosgene and phosgenation products and the design of production equipment: This technical standard is applicable to the new, expansion and reconstruction of phosgene and phosgenation product production equipment. 3 Normative References
GE 19041-2003
The clauses in the following documents become the clauses of this standard through reference in this standard. For the dated referenced documents, all the subsequent amendments (excluding the contents of the referenced documents) or revisions are not applicable to this standard. However, the parties who reach an agreement on this standard are encouraged to apply the latest versions of these documents. For the dated referenced documents, the latest versions are applicable to this standard. GB16297 Comprehensive emission standard of atmospheric pollutants
Design standard for industrial enterprises
Occupational limit values ​​for industrial enterprises
Safety management of hazardous chemicals
Labor protection regulations for workplaces using hazardous materials Safety technical supervision regulations for pressure vessels
3 Terms and definitions
The following terms and definitions are applicable to this standard
Key access paths
Highways and secondary roads, railways and waterways 3.2||tt ||Safety protection distance safetyinlance
Calculated from the boundary of the phosgene and phosgenation product production unit to the minimum allowable distance between the personnel and the densely populated area boundary, 3.3
Phosgenation products phosgenatlonpraducts The product of the chemical reaction between phosgene and one or more chemical substances, 4 General provisions and safety design principles
4.1 General provisions
The application for new construction, expansion and reconstruction projects shall be carried out in accordance with relevant national regulations. 4.2 Safety design principles
4.2.1 New engineering projects shall meet the following requirements: a) They shall not be located in areas where the peak acceleration of the ground is greater than 0.3 (excluding areas with a basic earthquake intensity of 8 degrees or more); b) They shall not be located within 10 wind directions of the annual frequency network of densely populated residential areas and towns; c) Phosgene and phosgenation production units shall maintain the safety protection distance shown in Table 1 and comply with the following provisions: 19041—2003
Rate 1 Safety protection distance high
Equipment system is relatively large (fold) total alliance/g
3 CIC- IXX
Anchor protection distance/U
There is no residential building within the Hm diameter range, and residential areas, commercial areas, etc. are not allowed to be built within the safety protection distance greater than 5m. The number of scattered residents shall not exceed 0.
e) The safety protection area between the difference and traffic should not be less than ten c m4.2.2 For the expansion and reconstruction of old factories, other construction within the 5m radius can maintain the status quo, and residential areas must be opened. The total amount of phosgene (equivalent to the total amount of the system) passing through the device should be less than 300kg. If it exceeds 300kg, follow 4.2.1. 4.2.3 Phosgene and phosgenation production equipment should be located downwind of the central area and form an independent production area. The area of ​​the equipment and the rear area should not be less than 100㎡. 4.2.4 The allowable liquid concentration of phosgene and phosgenation products in the air of the phosgenation production workshop must meet the minimum requirements of 8 industrial frequency all-round extraction.
4.2.5 It is strictly forbidden to transport phosgene and methyl isocyanate from other production plants in other places or the region as raw materials for product production. The transportation of hazardous gasification products must comply with relevant national laws and regulations. 5 Safety requirements for processes and equipment
5.1 Safety requirements for processes
5.1.1--Oxidation water content should not be greater than 50mg/m3 Oxygen content should not be greater than 50mg/m3. 5.1.2 Phosgene synthesis and phosgene synthesis 5.2 Safety requirements for the design of phosgene materials
5.2.1 The equipment used for the phosgene materials should be reliable and reliable. It is advisable to set up local exhaust ventilation. 5.2.2 The margin of each equipment containing phosgene materials should be determined according to the production conditions. The margin of the magnetic saw or low alloy steel should not be less than 3mm.
5.2.3 The pressure vessel containing phosgene materials must be designed to release the pressure Container recovery technical monitoring procedures, equipment should not be convenient for viewing mirrors. If it is necessary to use a viewing mirror, a viewing mirror with a protective cover should be selected, and local exhaust facilities should be installed. 5.2.4 The number of equipment containing highly hazardous materials such as methyl isocyanate and methyl formate (its main hazardous characteristics are shown in Appendix A) should be minimized and meet the following requirements: a) The total capacity of the equipment must be strictly controlled, and the capacity of a single unit should not be greater than 5 units. The number of units should be controlled below the standard. () There must be no corresponding system flow rate. d) The discharge pipe should not be connected upside down or bottom. ) Safety valves should be installed in the safety tubes, and explosion plates should be installed. After the explosion, an emergency damage system must be installed. A crushing alarm should be installed between the plate and the reading.
) The material of the transport of phosphine should be 16MR steel. It is strictly forbidden to use carbon steel or alloy materials containing steel, zinc and silver in the isocyanate. It is advisable to use wall drums and other corrosion resistant equipment.
Methyl formate tanks should be equipped with glass and other corrosion resistant equipment. 2
B) Double wall tanks should be used.
GH19041—2003
5.2.5 In pressure vessels containing phosgene materials, the connection between the ball and the palm plate of the grid exchanger and the displacement phosgene synthesis reactor should be tested for short filtration.
5.2.6 The temperature of water in the storage gas phase is strictly controlled in the system. The following measures should be taken for cooling and transportation: 1) For cooling, non-aqueous coolants should be used as coolants. If water is used as cooling agent, protective measures must be taken.
When water-soluble solution is used as storage coolant, cooling coils are prohibited. ") It is also not suitable to use gas turbines to transport materials to various production stations: When using a separate pump with good sealing performance, the number of pumps should be reduced to a minimum.
5.2.7 When parking is planned, all materials in the equipment should be processed before parking. When inspecting and repairing the pipeline, the material must be tested and analyzed before operation. There should be a dedicated person to supervise the operation. It is forbidden to operate without supervision. 6 Pipeline safety requirements
6.1 The conveying of materials containing phosgene should adopt the pipe without chain pins, and it is better to use the casing. The conveying of acetone should adopt the stainless steel valve. The sealing material should be ethylene or non-nuclear rubber plate, polyurethane, rubber and other materials. The conveying of acetone should adopt the pipe and valve of cyclic effect or other resistant materials. 6.2 The connection of phosgene-containing material pipe should adopt the butt welding. The pipe system should be tested for airtightness. The connection should be made by wire. Welding should be inspected by 100% X-ray flaw detection and the corresponding treatment should be done: 6.3 5.4 When transporting phosgene and materials containing phosgene, the installation design of the pipeline should meet the following requirements: a) The influence of heat, vibration and friction should be fully considered in the design of branches and rooms - there should be anti-emission facilities, and the corresponding pipes should be installed in the casing: 1) It is strictly forbidden to pass through rooms, office spaces and self-connected rooms, and should not be laid in structures; 2) The gaseous phosgene transported through the air should have heating and insulation facilities; 3) The transmission It is not advisable to install a switch on the access road. It is necessary to install a daily monitoring system connected to the household, and it is not advisable to install a glass mirror on the pipe that delivers liquid phosgene and gas-containing materials. If it is necessary to install a protective valve, a shut-off valve should be opened before the operation.
7 Safety requirements for equipment layout
7.1 The layout of the equipment should not be related to operation, and the ventilation and noise exhaust and the steps should have sufficient shielding surfaces and safe flow. 7.2 Phosgene and phosgenation equipment must be equipped with a high-rise exchange room. 7.3. The related products of phosgene isocyanate and methyl formate and their delivery pumps should be placed in a separate room with a commercial density of less than 2 rms. The internal volume should be greater than the internal volume. There should be a protective layer: the room should be equipped with a forced ventilation system. The exhaust gas must be led to the accident emergency disposal system for treatment. Hazardous gas recovery and disposal system
B.1 Phosgene recovery Phosgene and other toxic gases discharged during the phosgenation production process must be recovered and disposed of: the gases after disposal must be discharged to the atmosphere through high altitude discharge, in accordance with the provisions of GB16297. 8.2 The produced gas containing a small amount of phosgene after recovery treatment, the exhaust gas discharged to other devices (including exhaust gas from venting devices, sampling devices, non-purified and leached exhaust, flexible and non-toxic systems, etc.) can be further treated with alkali decomposition: GE19041—2003
9 General shutdown and emergency damage treatment system
9.1 Phosgene synthesis and phosgenation reaction equipment must be equipped with an emergency shutdown system and an emergency damage treatment system under accident conditions. The damage treatment system should continue to operate under normal production conditions. 9.2 When the phosgene and phosgenation production equipment have abnormal phenomena or phosgene and its highly toxic products leak, the emergency shutdown system should be started through the automatic control chain device and automatically connected to the emergency worst-case scenario system, and the following steps should be selected: A) Cut off all materials entering and leaving the production equipment, cool the corresponding equipment at a low speed, and depressurize the system to keep the production equipment in the fastest state.
》Immediately guide the hazardous materials in the equipment into the safe place. Filter the materials with the least leakage. You can use chlorine water or diluted alkali spray; you can also use sawdust (silicon powder, activated carbon) with kerosene first, and then use slaked lime to detoxify. ): Start the ventilation and detoxification system to discharge the toxic gas from the accident site. The treatment system of the system should eliminate most of the toxic gas in the accident site within 30 minutes. ) Hydrogen or steam can be sprayed at the discharge site to destroy the toxic gas. In the high-altitude discharge room, it is advisable to use gas or steam to neutralize the remaining phosgene.
10 Safety requirements for electrical and instrumentation safety
10.1 The power supply of phosgene production equipment should be equipped with double protection. The oxygen emergency stop system, gas and sugar ring treatment and product emergency treatment system are equipped with a generator. It is required to have automatic power supply within 30 minutes. 10.2 Phosgene and phosgenation product production plant areas must be equipped with phosgene, fluorine, and carbon monoxide monitoring devices; there must also be a self-regulating system that can automatically start emergency shutdown and emergency recovery in the event of an emergency. 11 Safety requirements for factory buildings
11.1 Phosgene and phosgenation production plants must be separated from living rooms and offices. 11.2 When the area of ​​each floor of a production plant is less than or equal to 100m2, there must be at least two people on the ground floor; when the area of ​​each floor is greater than 100m2, there must be at least three people on the ground floor; for plants with more than two floors, each floor must have a staircase leading directly to the outdoors. 11.3 Closed phosgene and phosgenation product production plants should be equipped with mechanical exhaust systems. Important equipment, phosgenation reactors, etc. should be equipped with local exhaust hoods, and exhaust must be connected to the emergency treatment system. 11.4 Open plants should be equipped with flexible flexible pipe exhaust systems in places where phosgene may be exposed to send toxic gases to the emergency treatment system.
11.5 The operation control room should maintain a good positive pressure ventilation state, and the air intake should be located away from the source of the toxic gas. 11.6 Phosgene and phosgenation product production vehicles must be equipped with eyewash and exhaust equipment. 12 Safety Management
12.1 Phosgene and phosgenation product manufacturers should formulate their own safety procedures and safety production management system in combination with their own production processes.
12.2 Operators who directly contact phosgene and phosgenation products during production, use, storage, and transportation should receive professional training in accordance with relevant regulations and take up their posts only after passing the assessment.
12.3 The equipment must be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year. The signal alarm system and communication system shall be checked and maintained to ensure that the equipment is in good working condition. A safety assessment shall be conducted annually for the equipment: 12.4 The production, use, storage and transportation of phosgene and phosgene products shall be equipped with effective protective equipment. Table 2) Phosgene monitoring and alarm equipment and fire-fighting equipment.
Protective mask
Separable gas mask
Security camera
Assistant boots
Table 2 Configuration of protective equipment
Air supply type
Gas isolation
Plastic or other materials
It is advisable to set up a high-level air source and a protective mask.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2 The produced gas containing a small amount of phosgene after recovery treatment, the exhaust gas discharged to other devices (including exhaust gas from venting devices, sampling, non-purification and leaching, flexible and non-toxic systems, etc.) can be further treated with alkali decomposition: GE19041—2003
9 General shutdown and emergency damage treatment system
9.1 Phosgene synthesis and phosgenation reaction equipment must be equipped with an emergency shutdown system and an emergency damage treatment system under accident conditions. The damage treatment system should continue to operate under normal production conditions. 9.2 When the phosgene and phosgenation production equipment have abnormal phenomena or phosgene and its highly toxic products leak, the emergency shutdown system should be started through the automatic control chain device and automatically connected to the emergency worst-case scenario system. The following steps should be selected for processing: A) Cut off all materials entering and leaving the production equipment, cool the corresponding equipment at a low speed, and depressurize the system to keep the production equipment in the fastest state.
》Immediately guide the hazardous materials in the equipment into the safe place. Filter the materials with the least leakage. You can use chlorine water or diluted alkali spray; you can also use sawdust (silicon powder, activated carbon) with kerosene first, and then use slaked lime to detoxify. ): Start the ventilation and detoxification system to discharge the toxic gas from the accident site. The treatment system of the system should eliminate most of the toxic gas in the accident site within 30 minutes. ) Hydrogen or steam can be sprayed at the discharge site to destroy the toxic gas. In the high-altitude discharge room, it is advisable to use gas or steam to neutralize the remaining phosgene.
10 Safety requirements for electrical and instrumentation safety
10.1 The power supply of phosgene production equipment should be equipped with double protection. The oxygen emergency stop system, gas and sugar ring treatment and product emergency treatment system are equipped with a generator. It is required to have automatic power supply within 30 minutes. 10.2 Phosgene and phosgenation product production plant areas must be equipped with phosgene, fluorine, and carbon monoxide monitoring devices; there must also be a self-regulating system that can automatically start emergency shutdown and emergency recovery in the event of an emergency. 11 Safety requirements for factory buildings
11.1 Phosgene and phosgenation production plants must be separated from living rooms and offices. 11.2 When the area of ​​each floor of a production plant is less than or equal to 100m2, there must be at least two people on the ground floor; when the area of ​​each floor is greater than 100m2, there must be at least three people on the ground floor; for plants with more than two floors, each floor must have a staircase leading directly to the outdoors. 11.3 Closed phosgene and phosgenation product production plants should be equipped with mechanical exhaust systems. Important equipment, phosgenation reactors, etc. should be equipped with local exhaust hoods, and exhaust must be connected to the emergency treatment system. 11.4 Open plants should be equipped with flexible flexible pipe exhaust systems in places where phosgene may be exposed to send toxic gases to the emergency treatment system.
11.5 The operation control room should maintain a good positive pressure ventilation state, and the air intake should be located away from the source of the toxic gas. 11.6 Phosgene and phosgenation product production vehicles must be equipped with eyewash and exhaust equipment. 12 Safety Management
12.1 Phosgene and phosgenation product manufacturers should formulate their own safety procedures and safety production management system in combination with their own production processes.
12.2 Operators who directly contact phosgene and phosgenation products during production, use, storage, and transportation should receive professional training in accordance with relevant regulations and take up their posts only after passing the assessment.
12.3 The equipment must be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year. The signal alarm system and communication system shall be checked and maintained to ensure that the equipment is in good working condition. A safety assessment shall be conducted annually for the equipment: 12.4 The production, use, storage and transportation of phosgene and phosgene products shall be equipped with effective protective equipment. Table 2) Phosgene monitoring and alarm equipment and fire-fighting equipment.
Protective mask
Separable gas mask
Security camera
Assistant boots
Table 2 Configuration of protective equipment
Air supply type
Gas isolation
Plastic or other materials
It is advisable to set up a high-level air source and a protective mask.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2 The produced gas containing a small amount of phosgene after recovery treatment, the exhaust gas discharged to other devices (including exhaust gas from venting devices, sampling, non-purification and leaching, flexible and non-toxic systems, etc.) can be further treated with alkali decomposition: GE19041—2003
9 General shutdown and emergency damage treatment system
9.1 Phosgene synthesis and phosgenation reaction equipment must be equipped with an emergency shutdown system and an emergency damage treatment system under accident conditions. The damage treatment system should continue to operate under normal production conditions. 9.2 When the phosgene and phosgenation production equipment have abnormal phenomena or phosgene and its highly toxic products leak, the emergency shutdown system should be started through the automatic control chain device and automatically connected to the emergency worst-case scenario system. The following steps should be selected for processing: A) Cut off all materials entering and leaving the production equipment, cool the corresponding equipment at a low speed, and depressurize the system to keep the production equipment in the fastest state.
》Immediately guide the hazardous materials in the equipment into the safe place. Filter the materials with the least leakage. You can use chlorine water or diluted alkali spray; you can also use sawdust (silicon powder, activated carbon) with kerosene first, and then use slaked lime to detoxify. ): Start the ventilation and detoxification system to discharge the toxic gas from the accident site. The treatment system of the system should eliminate most of the toxic gas in the accident site within 30 minutes. ) Hydrogen or steam can be sprayed at the discharge site to destroy the toxic gas. In the high-altitude discharge room, it is advisable to use gas or steam to neutralize the remaining phosgene.
10 Safety requirements for electrical and instrumentation safety
10.1 The power supply of phosgene production equipment should be equipped with double protection. The oxygen emergency stop system, gas and sugar ring treatment and product emergency treatment system are equipped with a generator. It is required to have automatic power supply within 30 minutes. 10.2 Phosgene and phosgenation product production plant areas must be equipped with phosgene, fluorine, and carbon monoxide monitoring devices; there must also be a self-regulating system that can automatically start emergency shutdown and emergency recovery in the event of an emergency. 11 Safety requirements for factory buildings
11.1 Phosgene and phosgenation production plants must be separated from living rooms and offices. 11.2 When the area of ​​each floor of a production plant is less than or equal to 100m2, there must be at least two people on the ground floor; when the area of ​​each floor is greater than 100m2, there must be at least three people on the ground floor; for plants with more than two floors, each floor must have a staircase leading directly to the outdoors. 11.3 Closed phosgene and phosgenation product production plants should be equipped with mechanical exhaust systems. Important equipment, phosgenation reactors, etc. should be equipped with local exhaust hoods, and exhaust must be connected to the emergency treatment system. 11.4 Open plants should be equipped with flexible flexible pipe exhaust systems in places where phosgene may be exposed to send toxic gases to the emergency treatment system.
11.5 The operation control room should maintain a good positive pressure ventilation state, and the air intake should be located away from the source of the toxic gas. 11.6 Phosgene and phosgenation product production vehicles must be equipped with eyewash and exhaust equipment. 12 Safety Management
12.1 Phosgene and phosgenation product manufacturers should formulate their own safety procedures and safety production management system in combination with their own production processes.
12.2 Operators who directly contact phosgene and phosgenation products during production, use, storage, and transportation should receive professional training in accordance with relevant regulations and take up their posts only after passing the assessment.
12.3 The equipment must be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year. The signal alarm system and communication system shall be checked and maintained to ensure that the equipment is in good working condition. A safety assessment shall be conducted annually for the equipment: 12.4 The production, use, storage and transportation of phosgene and phosgene products shall be equipped with effective protective equipment. Table 2) Phosgene monitoring and alarm equipment and fire-fighting equipment.
Protective mask
Separable gas mask
Security camera
Assistant boots
Table 2 Configuration of protective equipment
Air supply type
Gas isolation
Plastic or other materials
It is advisable to set up a high-level air source and a protective mask.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2. When the phosgene and phosgenation production line is unified and there is an abnormal phenomenon or an accident occurs in which phosgene and its highly toxic products leak, the emergency storage car should be started through the automatic control chain device and automatically connected to the emergency worst-case thinning system, and the following steps should be selected for processing: A) All materials entering and leaving the production equipment should be cut off, and the corresponding equipment should be cooled down quickly, and the system pressure should be relieved to make the production equipment in the fastest state.
》Immediately lead the highly toxic materials in the accident equipment into the safe filter) and filter the materials with the least amount of leakage. Chlorine water and dilute alkali can be used for spraying; you can also use sawdust (silicon powder, activated carbon, etc.) with kerosene first, and then use slaked lime to detoxify. 3. Start the ventilation and detoxification system to discharge the toxic gas from the accident site to the treatment system. The treatment capacity of the system should eliminate most of the toxic gas in the accident site within 30 minutes. ） Hydrogen or steam may be sprayed at the discharge site to destroy toxic gases. In high-altitude discharge areas, it is advisable to spray sedation or steam to neutralize the remaining phosgene.
10 Safety requirements for electrical and instrumentation safety
10.1 The power supply of phosgene and phosgenation product production equipment shall be equipped with a double-circuit protection system. The oxygen emergency stop system, gas and carbon monoxide treatment system and the emergency deterioration treatment system shall be equipped with a generator, which is required to have automatic power supply within 30 seconds. 10.2 Phosgene and phosgenation product production equipment areas shall be equipped with phosgene and fluorine gas, and carbon monoxide monitoring meters: an automatic adjustment meter that can automatically start emergency stop and emergency deterioration treatment in the event of an emergency should also be established. 11 Safety requirements for factories
11.1 Phosgene and phosgenation production factories must be separated from living rooms and offices. 11.2 When the area of ​​each floor of the production factory is less than or equal to 100m2, there should be at least two people. When the area of ​​each floor is greater than 100m2, there should be at least three exits. For factories with more than two floors, each floor must have a staircase leading directly to the outdoors. 11.3 Closed phosgene and phosgenation product production factories should be equipped with mechanical exhaust systems. Important equipment, phosgenation reactors, etc. should be equipped with local exhaust hoods, and the exhaust must be connected to the emergency treatment system. 11.4 Open factories should be equipped with movable elastic pipe exhaust systems in places where phosgene may be exposed: send toxic gases to the emergency treatment system.
11.5 Good positive pressure ventilation should be maintained in the operation control room, and the air intake should be located away from the source of the toxic gas. 11.6 Phosgene and phosgenation product production vehicles must be equipped with eyewash stations and exhaust and washing equipment. 12 Safety Management
12.1 The manufacturer of phosgene and phosgenation products shall formulate the factory's safety technical procedures and safety production management system in accordance with the production process.
12.2 The operators who are directly in contact with phosgene and phosgenation products during production, use, storage, transportation and transportation shall receive professional training in accordance with relevant regulations and shall be qualified before taking up their posts.
12.3 The equipment shall be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year, and the signal alarm system and communication system shall be checked and maintained to ensure that they are in good working condition. The equipment shall be evaluated for safety every year: 12.4 The production, use, storage and transportation sites of phosgene and phosgenation products shall be equipped with effective protective equipment. 2) Phosgene monitoring and firefighting equipment.
Protective mask
Quick-release poison mask
First-level protective film
Auxiliary protective boots
Table 2 Configuration of protective equipment
Air supply is commercial type
Military gas isolation
Grease or artistic materials
It is advisable to set up a high-level protective mask with air supply source.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2. When the phosgene and phosgenation production line is unified and there is an abnormal phenomenon or an accident occurs in which phosgene and its highly toxic products leak, the emergency storage car should be started through the automatic control chain device and automatically connected to the emergency worst-case thinning system, and the following steps should be selected for processing: A) All materials entering and leaving the production equipment should be cut off, and the corresponding equipment should be cooled down quickly, and the system pressure should be relieved to make the production equipment in the fastest state.
》Immediately lead the highly toxic materials in the accident equipment into the safe filter) and filter the materials with the least amount of leakage. Chlorine water and dilute alkali can be used for spraying; you can also use sawdust (silicon powder, activated carbon, etc.) with kerosene first, and then use slaked lime to detoxify. 3. Start the ventilation and detoxification system to discharge the toxic gas from the accident site to the treatment system. The treatment capacity of the system should eliminate most of the toxic gas in the accident site within 30 minutes. ） Hydrogen or steam may be sprayed at the discharge site to destroy toxic gases. In high-altitude discharge areas, it is advisable to spray sedation or steam to neutralize the remaining phosgene.
10 Safety requirements for electrical and instrumentation safety
10.1 The power supply of phosgene and phosgenation product production equipment shall be equipped with a double-circuit protection system. The oxygen emergency stop system, gas and carbon monoxide treatment system and the emergency deterioration treatment system shall be equipped with a generator, which is required to have automatic power supply within 30 seconds. 10.2 Phosgene and phosgenation product production equipment areas shall be equipped with phosgene and fluorine gas, and carbon monoxide monitoring meters: an automatic adjustment meter that can automatically start emergency stop and emergency deterioration treatment in the event of an emergency should also be established. 11 Safety requirements for factories
11.1 Phosgene and phosgenation production factories must be separated from living rooms and offices. 11.2 When the area of ​​each floor of the production factory is less than or equal to 100m2, there should be at least two people. When the area of ​​each floor is greater than 100m2, there should be at least three exits. For factories with more than two floors, each floor must have a staircase leading directly to the outdoors. 11.3 Closed phosgene and phosgenation product production factories should be equipped with mechanical exhaust systems. Important equipment, phosgenation reactors, etc. should be equipped with local exhaust hoods, and the exhaust must be connected to the emergency treatment system. 11.4 Open factories should be equipped with movable elastic pipe exhaust systems in places where phosgene may be exposed: send toxic gases to the emergency treatment system.
11.5 Good positive pressure ventilation should be maintained in the operation control room, and the air intake should be located away from the source of the toxic gas. 11.6 Phosgene and phosgenation product production vehicles must be equipped with eyewash stations and exhaust and washing equipment. 12 Safety Management
12.1 The manufacturer of phosgene and phosgenation products shall formulate the factory's safety technical procedures and safety production management system in accordance with the production process.
12.2 The operators who are directly in contact with phosgene and phosgenation products during production, use, storage, transportation and transportation shall receive professional training in accordance with relevant regulations and shall be qualified before taking up their posts.
12.3 The equipment shall be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year, and the signal alarm system and communication system shall be checked and maintained to ensure that they are in good working condition. The equipment shall be evaluated for safety every year: 12.4 The production, use, storage and transportation sites of phosgene and phosgenation products shall be equipped with effective protective equipment. 2) Phosgene monitoring and firefighting equipment.
Protective mask
Quick-release poison mask
First-level protective film
Auxiliary protective boots
Table 2 Configuration of protective equipment
Air supply is commercial type
Military gas isolation
Grease or artistic materials
It is advisable to set up a high-level protective mask with air supply source.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2 The personnel who are in direct contact with phosgene and phosgenation products during production, use, storage and transportation shall receive professional training in accordance with relevant regulations and shall be qualified before taking up their posts.
12.3 The equipment must be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year. The signal alarm system and communication system shall be checked and maintained to ensure that they are in good working condition. A safety assessment shall be conducted annually for the equipment: 12.4 The production, use, storage and transportation sites of phosgene and phosgenation products shall be equipped with effective protective equipment. Table 2) Phosgene monitoring and alarm equipment and fire-fighting equipment.
Protective mask
Separable gas mask
Protective lens
Assistant boots
Table 2 Configuration of protective equipment
Air supply type
Gas isolation
Plastic or other materials
It is advisable to set up a high-level air source for protection.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans is:
When the air density is 5ma/m-10ms/m, it will irritate the mucous membrane. When the gas concentration is sug/hour, it cannot last long. Once the skin contacts the material, it will cause injuries, tissue necrosis and perforation. A.3 Chloroformic acid is a colorless product with a chlorine content of 71.4°C and a flash point of 12.2°C. It is flammable, has toxicity and catalytic properties. It can release highly active phosgene with a toxicity of about 2.6 times that of chlorine. Direct contact with it can cause skin and membrane necrosis. Inhalation of the gas will cause obvious irritation to the nose, throat and throat. When the air temperature reaches 21U/inch, it will cause inflammation of the upper respiratory tract and respiratory tract for a certain period of time. When the temperature is higher, it can cause pulmonary edema:2 The personnel who are in direct contact with phosgene and phosgenation products during production, use, storage and transportation shall receive professional training in accordance with relevant regulations and shall be qualified before taking up their posts.
12.3 The equipment must be inspected and maintained regularly. The process equipment containing phosgene materials shall be monitored for corrosion every year. The signal alarm system and communication system shall be checked and maintained to ensure that they are in good working condition. A safety assessment shall be conducted annually for the equipment: 12.4 The production, use, storage and transportation sites of phosgene and phosgenation products shall be equipped with effective protective equipment. Table 2) Phosgene monitoring and alarm equipment and fire-fighting equipment.
Protective mask
Separable gas mask
Protective lens
Assistant boots
Table 2 Configuration of protective equipment
Air supply type
Gas isolation
Plastic or other materials
It is advisable to set up a high-level air source for protection.
With effect
Same as slow: person makeup
With emergency accident handling and the number of nurses and the number of emergency accident handling and nurses
Select people to do the corresponding
CH 19041—2003
Prepare for rough teaching
30% of the operational personnel
12.5 A wind vane must be installed in the factory. Its position and height should be set at a dangerous place that is easy for personnel to see within the wood factory and the nearby area (500m),
13 Health protection and emergency response
13, 1 The production of phosgene and phosgenation products should comply with the requirements of relevant laws and regulations, and formulate an accident emergency plan. The emergency response plan should include the following: 1. Basic situation of the factory area: 2. Quantity and layout of hazardous chemicals; 3. Responsibilities of the protective organization; 4. Communication link mode and number regulations; 5. Tasks and training of emergency rescue professionals: 6. Precautions; 7. Accident handling; 8. Emergency evacuation; 9. Emergency rescue and repair; 10. On-site medical rescue. 11. Social support. 12.2 The factory should set up an occupational health and occupational disease prevention and control management organization in accordance with the provisions of the industrial enterprise design health standard 3, and be equipped with medical personnel with nursing experience and necessary first aid equipment and medicines. 13.3 Gas protection analysis or emergency assistance should be installed, and monitoring personnel and equipment should be equipped. 13.4 Factory Hazard Control The use of hazardous materials in factories shall be subject to the requirements of labor protection, prevention, control and elimination of hazards, and the health and safety of personnel engaged in the production of phosgene and photochemical products. GE 19041—2003
A.1 Phosgene
Appendix A
(Informative record)
Main hazardous properties of phosgene and some toxic phosgene products Molecular formula C1 The pure product is a colorless gas with a boiling point of 8.2°C. The industrial product is yellow with a non-toxic odor and is non-flammable. The human body has different reactions at different concentrations as shown in Table A.1 Table A.1 Reactions of the human body at different concentrations
Phosgene concentration/(mg/m)
A2 Methyl isocyanate MIC)
|Can be felt
Strong smell
Long-lasting release of liquid may cause life-threatening
Can cause mild irritation within 1mn
Severe irritation to respiratory tract within 1-2min
Life-threatening
Molecular formula: CHNCO: It is a non-volatile, volatile liquid with a vapor pressure of 38.1°C and a thermal limit of 5.3-26°C. Inhalation of liquid may cause fibrosis of the lungs, resulting in bronchial obstruction and swelling. Symptoms of poisoning include chest pain, fever, and respiratory instability.
MTC's reaction to humans
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.