... .5%, 99.7%, 99.8%, , 98%, 95 Grade Standard: Electron, Rubber, Agriculture, Ceramics, painting, Nano Grade etc.Packing: 25kg or 50 ... , soluble in acid, alkaki and amkonium solution.Application: Used in rubber, dope cable, porcelain enamel, oil, pottery and porcelain, glass and ... Soluble Substance % ≤0.40.60.71.03.0Sieve Residue (45um mesh ) % ≤0.280.320.50.50.5Volatile % ≤0.40.40.50 ...