Barium | Medical Management Guidelines | Toxic Substance ...
Barium is a silvery-white to yellowish odorless metal that is found in nature primarily as barium sulfate or barium carbonate (ATSDR 2005; HSDB 2007a). Barium is non-combustible, but may decompose upon heating to produce corrosive or toxic fumes (HSDB 2007a). Elemental barium and barium sulfide may be flammable in moist air (ATSDR 2005).