Barium nitrite
Barium nitrite is a chemical compound with the formula Ba2, the nitrous acid salt of barium. It is a water-soluble white to yellowish powder. It is used to prepare other metal nitrites, such as lithium nitrite.
Synthesis
Barium nitrite can be prepared by reacting barium nitrate with lead metal sponge, or by reaction of lead nitrite with barium chloride.The monohydrate can be crystallized from a stoichiometric solution of barium chloride and sodium nitrite.