Hydrogen cyanide

CAS RN: 74-90-8

Fire Fighting Procedures

Fire situation may require evacuation. Allow burning of material until flow of gas can be stopped. Use water spray, dry chemical, "alcohol resistant" foam, or carbon dioxide. Water may be ineffective. Approach fire from upwind. Fight fire from protected location or maximum possible distance.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with powder, water spray, foam, carbon dioxide.
Cyanide salts must be protected from large concn of carbon dioxide to avoid hydrogen cyanide liberation. Carbon dioxide fire extinguishers should not be used. /Cyanide salts/
If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Solid streams of water may be ineffective. Use "alcohol" foam, dry chemical or carbon dioxide. /Hydrogen cyanide, aqueous solution; Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
If fire becomes uncontrollable or container is exposed to direct flame - consider evacuation of one-half (1/2) mile radius. /Hydrogen cyanide, aqueous solution; Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
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