[{"from": "human", "value": "Provide a brief overview of this molecule. [Cl-1].[Cl-1].[Ba+2]"}, {"from": "gpt", "value": "The molecule is a chemical compound of barium. It is used in the laboratory as a test for sulfate ion. In industry, barium chloride is mainly used in the purification of brine solution in caustic chlorine plants and also in the manufacture of heat treatment salts, case hardening of steel, in the manufacture of pigments, and in the manufacture of other barium salts. It is also used in fireworks to give a bright green color. Barium is a metallic alkaline earth metal with the symbol Ba, and atomic number 56. It never occurs in nature in its pure form due to its reactivity with air, but combines with other chemicals such as sulfur or carbon and oxygen to form barium compounds that may be found as minerals. (L214, 408, L204)"}]