From fire extinguishers

The effects of dermal contact with bromomethane have been described in numerous case reports of humans who were exposed either to liquid bromomethane (mainly from fire extinguishers) or... 

Matrat M, Laurence MF, Iwatsubo Y, et al. Reactive airways dysfunction syndrome caused by bromochlorodifluoromethane from fire extinguishers. Occup Environ Med 2004 61 712-14. 

STORAGE Keep upwind, with necessary provision to contain effluent from fire extinguishing. 

Calculate CO2 generated from fire extinguishers that release CO2. 

Carbon tetrachloride must not be dried with sodium as an explosion may result. Fire extinguishers containing this solvent (e.g., Pyrene ) cannot therefore be applied to a fire originating from sodium. 

In this sequence the Cl also acts as a catalyst and two molecules are destroyed. It is estimated that before the Cl is finally removed from the atmosphere in 1—2 yr by precipitation, each Cl atom will have destroyed approximately 100,000 molecules (60). The estimated O -depletion potential of some common CFCs, hydrofluorocarbons, HFCs, and hydrochlorofluorocarbons, HCFCs, are presented in Table 10. The O -depletion potential is defined as the ratio of the emission rate of a compound required to produce a steady-state depletion of 1% to the amount of CFC-11 required to produce the 1% depletion. The halons, bromochlorofluorocarbons or bromofluorocarbons that are widely used in fire extinguishers, are also ozone-depleting compounds. Although halon emissions, and thus the atmospheric concentrations, are much lower than the most common CFCs, halons are of concern because they are from three to ten times more destmctive to O, than the CFCs. 

Foam Production This is important in froth-flotation separations in the manufac ture of cellular elastomers, plastics, and glass and in certain special apphcations (e.g., food products, fire extinguishers). Unwanted foam can occur in process columns, in agitated vessels, and in reactors in which a gaseous product is formed it must be avoided, destroyed, or controlled. Berkman and Egloff (Emulsions and Foams, Reinhold, New York, 1941, pp. 112-152) have mentioned that foam is produced only in systems possessing the proper combination of interfacial tension, viscosity, volatihty, and concentration of solute or suspended solids. From the standpoint of gas comminution, foam production requires the creation of small biibbles in a hquid capable of sustaining foam. 

Fire Hazards - Flash Point Not flammable Flammable Limits in Air (%) Not flammable Fire Extinguishing Agents Water (from protected location) Fire Extinguishing Agents Not To Be Used Not pertinent Special Hazards of Combustion Products Toxic gases are produced in a fire Behavior in Fire May explode when involved in a fire or exposed to shock or friction Ignition Temperature Not flammable Electrical Hazard Not pertinent Burning Rate Not flammable. 

Extinguishing Agents Dry chemical, carbon dioxide, water fog, chemical foam Fire Extinguishing Agents Not To Be Used None Special Hazards of Combustion Products Not pertinent Behavior in Fire Vapor from molten benzoic acid may form explosive mixture with air. Concentrated dust may form explosive mixture in air Ignition Temperature (deg. F) 1,063 Electrical Hazard Not pertinent Burning Rate Not pertinent. 

Fire Hazards - Flash Point (deg. F) 2Q OC Flammable Limits in Air (%) 1.5 - 18.3 Fire Extinguishing Agents Dry chemical, alcohol foam, carbon dioxide Fire Extinguishing Agents Not To Be Used Water may be ineffective Special Hazards of Combustion Products No data Behavior in Fire Containers may explode in fires. Apply water to cool containers from a safe distance Ignition Temperature (deg. F) 959 Electrical Hazard No data Burning Rate No data. 

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