Barium, Elemental

Incompatible with /trichloro-1,1,2-trilfuoro-1,2,2-ethane/, /trichlorofluoroethane/, /trichloroethylene/ and water, 1,1,2-trichlorotriluoroethane, and fluorotrichloroethane.

When heated to approximately 200C in hydrogen, barium reacts violently, forming BaH2.

Barium reacts violently with acids ... A violent reaction occurred when small chunks of barium were cleaned by submerging in chemically pure carbon tetrachloride ... Mixtures of finely divided barium metal and a number of halogenated hydrocarbons possess explosive capability. Specifically, impact sensitivity tests have shown that granular barium in contact with monofluorotrichloromethane, trichlorotrifluorethane, carbon tetrachloride, trichloroethylene, or tetrachloroethylene can detonate.

Barium rapidly decomposes water. The heat of reaction is sufficent that the evolved hydrogen may ignite.

The free metal presents ... explosion hazard if exposed to moist air owing to liberation of hydrogen.

Reacts in cold water with evolution of hydrogen gas

Extremely reactive, reacts readily with water, ammonia, halogens, oxygen, and most acids.