Food additives
Zinc sulfate, heptahydrate

Product name

Zinc sulfate, heptahydrate

Specification

Food 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 standardGB 25579-2010

Test items

Specification

Food grade

Appearance

White crystal powder

Assay

99.0~108.7%

Acidity

Conform

Alkaline and alkaline metals

0.5%

Cadmium

2 mg/kg

Lead

4mg/kg

Mercury

1 mg/kg

Selenium

30 mg/kg

Arsenic

3 mg/kg

Storage

   Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.


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