Zinc oxide (industrial grade)

Molecular formula: ZnO

Molecular weight: 81.39

Appearance: White powder

Properties: Specific gravity: 5.606; melting point: 1975 ℃. It is a amphoteric oxide that is soluble in acids and bases but insoluble in water and ethanol, and sublimates when heated to 1800 ℃.

Usage: Rubber products, ceramics, pharmaceutical products, food, cosmetics, paints, printing and dyeing products, magnetic materials, electronic products, feed, cathode ray tubes, etc.

Item	Indicator
Item	Type I	Type II	Type III
Appearance	White powder
Zinc oxide (Zn0, dried) ≥	99.70	99.70	99.50
Metal content （Zn） ≤	None	None	0.008
Lead (Pb) content ≤	0.0080	0.05	0.10
Copper (Cu) content ≤	0.0002	0.0004	0.0007
Manganese (Mn) content ≤	0.0001	0.0001	0.0003
Cadmium (Cd) content ≤	0.002	0.005	0.010
Iron (Fe) content ≤	0.005	0.010	—
Substances insoluble in hydrochloric acid ≤	0.006	0.008	0.03
loss on ignition ≤	0.20	0.20	0.25
Residue on sieve (45um test sieve) ≤	0.10	0.15	0.20
Water-soluble substance ≤	0.10	0.10	0.15
105℃ volatile compounds ≤	0.3	0.4	0.5
Packaging: Outer kraft paper bag, inner plastic bag, net weight 25kg per bag
In addition to the above specifications, other acceptable special specifications are customized according to actual sample testing.