Bismuth sulfide is a chemical substance with the molecular formula Bi2S3,insoluble in water, toxic, weakly radioactive, and harmless to the human body.
Magnesium nitride is an inorganic compound composed of nitrogen and magnesium and belongs to the cubic crystal system. It is used to prepare special ceramic materials.
Zinc oxide is an oxide of zinc with the chemical formula ZnO. Insoluble in water, soluble in acid and strong alkali. Zinc oxide ZnO is used as an additive in many materials and products.