H2O: Slightly soluble .
Excellent inorganic white pigment, mainly used for coloring paint. Flame retardant for various resins, synthetic rubber, canvas, paper, paint, etc., catalyst for petrochemical industry, synthetic fiber. It is used to make mordant and opalescent agent, and is the raw material for the synthesis of antimony salt. Enamel industry is used to increase the opacity and surface gloss of enamel. The glass industry is used as a decolorizing agent to replace arsenious acid.