Specialty supply ZINC CARBONATE
The Zinc Carbonate 57.5%, 57.0%, 56.5%, etc.
Molecular Formula: ZnCO3•2Zn(OH)2•H2O
Molecular Weight: 324.15
Property: White or yellowish fine amorphous powder, smell-less, tasteless. The proportion is 4.42-4.45, does not dissolve in water and alcohol, slightly soluble in ammonia, can dissolve in the diluted acid and the sodium hydroxide.
Usage: Used as the light apocrustic and the latex products raw material. It can prepare calamine and sued as the skin protecting agent, also may use in the rayon, petroleum and the chemical fertilizer industries as the main material of the desulfurizer and the catalyst. On the rubber product, the paint, the medicine and other chemical products, it is also widely applied.
Quality Standard: Conform to the chemical trade standard of the People's Republic of China HG/T2523-93.
Packing: In polyethylene film bag with outer polypropylene woven bag, 25kg or as required by customers.
Items
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Index
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Best quality product
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First quality product
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Qualified product
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Main content(Zn dry basis) % ≥
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57.5
|
57.0
|
56.5
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Ignition loss %
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25.0-28.0
|
25.0-30.0
|
25.0-32.0
|
Heavy metal(Pb) content % ≤
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0.04
|
0.05
|
0.05
|
Moisture % ≤
|
2.5
|
3.5
|
5.0
|
Sulfate(SO4 ) % ≤
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0.60
|
0.80
|
|
Fineness through the 75um mesh % ≥
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95.0
|
94.0
|
93.0
|
Cadmium(Cd) % ≤
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0.10
|
--
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0.003
|
Note: Special requirements should be decided through negotiation between the seller and the buyer.
Transaction Process:
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