This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and contract (or order) content of bismuth trioxide. This standard applies to bismuth trioxide produced by wet or fire methods using bismuth metal as raw material. Bismuth trioxide products are mainly used in the fields of inorganic synthesis, catalysts, rubber compounding agents, medicine, glass compounding agents, porcelain capacitors, piezoelectric ceramics, varistors and other electronic components, ceramic powder materials and other fields.