Halogenated hydrocarbons flammability

Explosible dusts can also be changed into mixtures which are no longer explosible by the addition of inert dusts (e.g., rock salt, sodium sulrate). In general, inert dust additions of more than 50 wt % are necessary here. It is also possible to replace flammable solvents and cleaning agents by nonflammable halogenated hydrocarbons or water, or flammable pressure transmission fluids by halocarbon oils. 

Not to be Used Water, foam, carbon dioxide, or halogenated hydrocarbons Special Hazards of Combustion Products No data Behavior in Fire Reacts violently with water, forming flammable and explosive hydrogen gas. This product may spontaneously ignite in air Ignition Temperature No data Electrical Hazard Not pertinent Burning Rate Not pertinent. 

The auto-ignition temperatures of various halogenated hydrocarbons in presence of chlorine are considerably below the corresponding values in air. Examples are (in °C) chloromethane 215 (618 in air) dichloromethane 262 (556) 1,2-dichloropropane 180 (555°C). Flammability limits are usually wider in chlorine... 

Several lower partially halogenated hydrocarbons (dichloromethane, bromo-methane, trichloroethylene, 1,1,1-trichloroethane) have no measurable flash point, but are nonetheless capable of forming flammable and explosive mixtures with air, and several such accidents are recorded. 

There are many uses for the halogenated hydrocarbons. Many of them are flammable most are combustible. Some halogenated hydrocarbons are classified as neither, and a few are excellent fire-extinguishing agents (the Halons ), but they will all decompose into smaller, more harmful molecular fragments when exposed to high temperatures for long periods of time. 

Replacing flammable refrigerants by halogenated hydrocarbons that are known to have acceptable environmental effects. 

Precautions Diborane is a highly toxic, flammable, and reactive gas. It is spontaneously combustible in moist air and may burn or explode upon contact with halogenated compounds. It explodes on contact with fluorine, chlorine, halogenated hydrocarbons, fuming nitric acid, and nitrogen trifluoride. It is a very dangerous gas and must be handled and used only in chemical laboratories by experienced and trained professional workers. ... 

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