... .7%, 99.8%, , 98%, 95 Grade Standard: Electron, Rubber, Agriculture, Ceramics, painting, Nano Grade etc.Packing: 25kg or 50 ... .Properties: White powder, odourless, relative density 5.606, stable under normal temperature.Insoluble in water and alcohol, soluble in ... acid, alkaki and amkonium solution.Application: Used in rubber, dope cable, porcelain enamel, oil, pottery and porcelain, ...