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Basic Zinc Carbonate


Molecular formula: ZnCO3·2Zn(OH)2.H20 
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
Item
Index
Top grade
First grade
Qualified product
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 (calculated as Pb) content, % ≤
0.04
0.05
0.05
Moisture, ≤
2.5
3.5
5.0
Sulfate (SO 4 ), % ≤
0.60
0.80
 
Fineness through 75um sieve, ≥
95.0
94.0
93.0
Cadmium (Cd) content, ≤
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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