Flammability and Explosibility

Carbon disulfide is extremely flammable and is a dangerous fire hazard (NFPA rating = 3). It has a high vapor pressure and extremely low autoignition temperature. Its vapor is heavier than air and can travel a considerable distance to a source of ignition and flash back. The vapor forms explosive mixtures in air at concentrations of 1.3 to 50%. Carbon disulfide can be ignited by hot surfaces such as steam baths that would ordinarily not constitute an ignition source for other flammable vapors. Rust (iron oxide) may increase the likelihood of ignition by hot surfaces. Carbon disulfide fires should be extinguished with CO2 or dry chemical extinguishers.

Reactivity and Incompatibility

Reactions of alkali metals with carbon disulfide may cause explosions. Carbon disulfide reacts violently with metal azides.

Storage and Handlings

Carbon disulfide should be handled in the laboratory using the "basic prudent practices", supplemented by additional precautions for dealing with extremely flammable substances. In particular, carbon disulfide should be used only in areas free of ignition sources (including hot plates, incandescent lightbulbs, and steam baths), and this substance should be stored in tightly sealed metal containers in areas separate from oxidizers.