Zinc oxide Zinc Oxide 99.5% Specifications: 1.Appearance: pure white powder 2.Assay (ZnO): 99.5 min 3.Lead (Pb): 0.05% max 4.Copper (Cu): 0.0004% max 5.Manganese (Mn): 0.0001% max 7.Acid-Insoluble Substance : 0.008% max 8.Water Soluble portion : 0.10% max 9.Sieve Finese (45μm): 99.85% pass Zinc Oxide 99.7% Specifications : 1.Appearance: pure white powder 2.Assay (ZnO): 99.7 min 3.Lead (Pb): 0.0370% max 4.Copper (Cu): 0.0002% max 5.Manganese (Mn): 0.0001% max 6.Acid-Insoluble Substance: 0.006% max 7.Water Soluble portion : 0.10% max 8.Sieve Finese (45μm): 99.9% pass Utilizing:Accelerator activator, pigment, and reinforcing agent in rubber; oinment; pigment and mold growthe inhibitor in paints; ceramics; floor tile; glass; zinc salts (zinc stearate etc.) feed additive; semiconductor in electronic devices; electronic ceramics, raw material to produce zinc phosphate as steel coating Properties: white powder; odorless; bitter taste; absorbs carbon dioxide from the air; has greatest ultraviolet absorption of all commercial pigments sp.gr.5.48; m.p.19750C; soluble in acids and alkalis; insobuble in water and alcohol. Noncombustible; nontoxic as powder.