- CHEMICAL DANGERS:
- Phosgene (CG) reacts violently with strong oxidants, amines, alkalis, and many metals.
- Phosgene (CG) reacts with alcohols and ammonia.
- Above 572°F (300°C), phosgene (CG) decomposes in the presence of moisture to form hydrochloric acid and carbon dioxide.
- In the presence of moisture, phosgene (CG) attacks plastic, rubber, and many metals.
- EXPLOSION HAZARDS:
- Phosgene is not combustible.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
- FIRE FIGHTING INFORMATION:
- Phosgene (CG) is non-combustible.
- When heated to decomposition, phosgene (CG) produces toxic and corrosive fumes (hydrogen chloride, carbon monoxide, and chlorine).
- For small fires, use dry chemical or carbon dioxide.
- For large fires, use water spray, fog, or regular foam. Move containers from the fire area if it is possible to do so without risk to personnel. Do not get water inside containers. Damaged cylinders should be handled only by specialists.
- For fire involving tanks, fight the fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after the fire is out. Do not direct water at the source of the leak or at safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tanks. Always stay away from tanks engulfed in fire.
- Run-off from fire control may cause pollution.
- If the situation allows, control and properly dispose of run-off (effluent).
- INITIAL ISOLATION AND PROTECTIVE ACTION DISTANCES:
- If a tank, rail car, or tank truck is involved in a fire, isolate it for 1 mi (1600 m) in all directions; also consider initial evacuation for 1 mi (1600 m) in all directions.
- Small spills (involving the release of approximately 52.83 gallons (200 liters) or less)
- First isolate in all directions 500 ft (150 m).
- Then protect persons downwind during the day: 0.8 mi (1.3 km).
- Then protect persons downwind during the night: 2.0 mi (3.3 km).
- Large spills (involving quantities greater than 52.83 gallons (200 liters))
- First isolate in all directions 2500 ft (800 m).
- Then protect persons downwind during the day: 4.5 mi (7.3 km).
- Then protect persons downwind during the night: 7.0+ mi (11.0+ km).
- PHYSICAL DANGERS:
- Vapors are heavier than air. They will spread along the ground and collect and stay in poorly-ventilated, low-lying, or confined areas (e.g., sewers, basements, and tanks).
- Hazardous concentrations may develop quickly in enclosed, poorly-ventilated, or low-lying areas. Keep out of these areas. Stay upwind.
- Phosgene (CG) liquid sinks in water.
- NFPA 704 Signal:
- Health: 4
- Flammability: 0
- Reactivity: 1
- Special:
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- SAMPLING AND ANALYSIS:
- OSHA: 61
- NIOSH: Not established/determined
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