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Chemical reagent
Zinc sulfate, heptahydrate

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 standardGB/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.

Product categories
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