Molecular ZnCO3•2Zn(OH)2•H2O
Uses: Used as materials for light astringent and latex products. Used in preparing calamine lotion. Used as skin protectant. Also used in producing rayon and catalytic desulfurating agent.
Quality index:
|
Index name
|
Index
|
|
Top quality
|
First quality
|
Qualified product
|
|
Appearance
|
White powder
|
|
Main content (based on Zn, dry basis) %
|
≥ 57.5
|
≥ 57.0
|
≥ 56.5
|
|
Loss on ignition %
|
25.0-28.0
|
25.0-30.0
|
25.0-32.0
|
|
Heavy metal (based on Pb) %
|
≤ 0.04
|
≤ 0.05
|
≤ 0.05
|
|
Water content %
|
≤ 2.5
|
≤ 3.5
|
≤ 5.0
|
|
Sulphate (based on SO42-) %
|
≤ 0.60
|
≤ 0.80
|
-
|
|
Fineness (pass 75 μ m sieve) %
|
≥ 95.0
|
≥ 94.0
|
≥ 93.0
|
|
Cadmium (Cd) %
|
≤ 0.10
|
-
|
-
|
|
