Weifang Dongfangsheng Chemical Co.,Ltd.
Basic Zinc Carbonate
Molecular formula: ZnCO3·2Zn(OH)2.H20
Molecular weight: 342.23
Molecular weight: 342.23
CAS number: 5970-47-8
HS CODE: 2836999000
Physical and chemical properties:
White fine amorphous powder, odorless and tasteless. The relative density is 4.42~4.45. Insoluble in water and alcohol, slightly soluble in ammonia, soluble in dilute acid and sodium hydroxide. When reacted with 30% H 2 O 2 , CO 2 is released to form peroxide. At (250-500) ℃, heating according to different time, when cooling to room temperature, fluorescence phenomenon can occur.
Quality Standard:
Implement the chemical industry standard HG/T2523-93 of the People's Republic of China
Quality Index
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Item
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Index
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||
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Top grade
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First grade
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Qualified product
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|
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Main content (based on Zn dry basis), %≥
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57.5
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57.0
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56.5
|
|
Loss on ignition
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25.0-28.0
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25.0～30.0
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25.0～32.0
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|
Heavy metal (calculated as Pb) content, % ≤
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0.04
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0.05
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0.05
|
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Moisture, ≤
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2.5
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3.5
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5.0
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Sulfate (SO 4 ), % ≤
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0.60
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0.80
|
|
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Fineness through 75um sieve, ≥
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95.0
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94.0
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93.0
|
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Cadmium (Cd) content, ≤
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0.10
|
|
|
Product Uses as light astringent and raw material for latex products. Calamine is formulated for use as a skin protectant. It can also be used in the production of rayon and catalytic desulfurizer
Packing, storage and transportation packed in plastic woven bags lined with polyethylene plastic bags, each bag has a net weight of 25kg. Store in a cool, ventilated and dry warehouse. It cannot be stored and transported together with acid and alkali items. Pay attention to moisture. During transportation, it should be protected from rain, moisture, sun and heat. Water can be used for rescue in case of fire. Sand and soil, fire extinguisher.
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