Product name |
Zinc sulfate, heptahydrate |
Specification |
Reagent grade |
Molecular formula |
ZnSO4·7H2O |
CAS |
7446-20-0 |
H.S. CODE |
2833293000 |
Molecular weight |
278.05 |
Appearance |
White crystal powder |
Package |
25KG Woven bags or fiber drums |
Property:
Odorless crystaline powder or granules. zinc sulfate is a colorless crystalline solid. Zinc sulfate is also obtained as a hexahydrate, ZnSO4.6H2O, and as a heptahydrate ZnSO4.7H2O. All forms are soluble in water. All are noncombustible. It is used in the production of rayon, as a feed supplement, and as a fertilizer ingredient.
Application:
Used in the manufacture of lithopone, and used as mordant, astringent, wood preservative, etc.
Test standard:GB/T 666-2011
Test items |
Specification |
|
AR grade |
CP grade |
|
Appearance |
White crystal powder |
White crystal powder |
Assay |
≥99.5% |
≥99.0% |
Appearance of solution |
Conform |
Conform |
pH |
4.4-6.0 |
4.4-6.0 |
Water insoluble |
≤0.01% |
≤0.02% |
Chloride |
≤0.0005% |
≤0.002% |
Total nitrogen |
≤0.001% |
≤0.002% |
Arsenic |
≤0.00005% |
≤0.0002% |
Sodium |
≤0.05% |
≤0.1% |
Magnesium |
≤0.005% |
≤0.01% |
Potassium |
≤0.01% |
≤0.02% |
Calcium |
≤0.005% |
≤0.01% |
Manganese |
≤0.0003% |
≤0.001% |
Iron |
≤0.0005% |
≤0.002% |
Copper |
≤0.001% |
≤0.005% |
Cadmium |
≤0.0005% |
≤0.002% |
Lead |
≤0.001% |
≤0.01% |
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.