Chemical name:

Zinc sulphate monohydrate

Zinc Sulphate Heptahydrate

Appearance:

white or slight yellow crystal or powder

Property:

white powder or needle crystal, easy soluble in water and insoluble in alcohol and ketone, gradual weathering in air.

Usage:

mainly used to produce synthetic fiber, fertilizer, electrolysis, electroplating, organic pigment, pesticide, etc

Item

HG/T2326—92

ZnSO₄.H₂O

ZnSO₄.7H₂O

ZnSO₄.H₂O

ZnSO₄.7H₂O

High-

grade

First-

grade

Second-

grade

High-

grade

First-

grade

Second-

grade

Zn

%

≥

35.70

35.34

34.61

22.51

22.06

20.92

35.0

21.0

ZnSO₄.H₂O

ZnSO₄.7H₂O

%

%

≥

≥

98.0

—

97.0

—

95.0

—

—

99.0

—

97.0

—

92.0

98.0

—

98.0

Insoluble substance

%

≤

0.020

0.050

0.10

0.020

0.050

0.10

0.1

0.05

PH(50g/Lsolution)

 

≥

4.0

4.0

—

3.0

3.0

—

4.0

4.0

Chloride (Cl)

%

≤

0.20

0.60

—

0.20

0.60

—

0.2

0.5

Pb

%

≤

0.002

0.007

0.010

0.002

0.010

0.010

0.01

0.01

Fe

%

≤

0.008

0.020

0.060

0.005

0.020

0.060

0.06

0.06

Mn

%

≤

0.01

0.03

0.05

0.01

0.10

—

 

0.1

Cd          

%

≤

0.002

0.007

0.010

0.002

0.010

—

0.003

0.01

Cu           

%

≤

0.001

—

—

0.002

—

—

—

—