Fire toxicity irritant gases

Detailed studies have also been made on the toxicity of HC1, an irritant gas often present in fires. It does not cause baboon or rat incapacitation up to very high exposure doses which are sufficient (or very close) to cause eventual death [12]. Furthermore, a recent study has shown that the effects of irritants are heavily dependent on the animal model used [13]. 

Perchloromethyl — Fire Hazards Flash Point (deg. F) Not flammable Flammable Limits in Air (%) Not flammable Fire Extinguishing Agents Not pertinent Fire Extinguishing Agents Not to be Used Not pertinent Special Hazards of Combustion Products Very irritating vapors formed from hot material. May form toxic phosgene gas, hydrogen chloride and sulfur dioxide Behavior in Fire ... 

Recently, two significant developments have raised the profile of fire toxicity. The first is the development of the steady-state tube furnace (SSTF) (ISO TS 19700 2006), which has been shown to replicate the toxic product yields corresponding to the individual stages of fires. The second is the acceptance of performance-based fire design as an alternative to prescriptive fire regulations, so that architects can specify the components within a building based on a safe escape time, within which toxic and irritant gas concentrations must not approach a lethal level (ISO 13571 2007). 

DOT CLASSIFICATION 4.1 Label None SAFETY PROFILE Moderately toxic by ingestion, A severe eye and skin irritant. Mutation data reported. Flammable when exposed to heat or flame can react with oxidizing materials. To fight fire, use alcohol foam, CO2, dry chemical. Incompatible with liquid oxygen. Dangerous when heated to decomposition it emits toxic formaldehyde gas. See also FORMALDEHYDE. 

Special Hazards of Combustion Products Irritating and toxic ammonia gas may fonn in fires Behavior in Fire Not pertinent Ignition Temperature (deg. F) Not pertinent Electrical Flazard Not pertinent Burning Rate Not pertinent. Chemical Reactivity Reactivity with Water No reaction Reactivity with Common Materials No reaction Stability During Transport Slowly releases ammonia gas, which may collect in closed container Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Not considered to be a fire hazard. Irritating and toxic ammonia gas may form in fires. Explosion ... 

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