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By certification 
CAS: 5970-47-8
HS code:2836999000
Product name: Zinc carbonate
Molecular formula: ZnCO3-2Zn(OH)2-H2O 　
Property: White fine amorphous powder.Odorless and tasteless. Relative density:4.42～4.45.Insoluble in water and alcohol. Slightly soluble in ammonia. Soluble in dilute acid and sodium hydroxide. Mixed with 30% hydrogen peroxide, release carbon dioxide, and form peroxides
Use: Used as a light astringent, prepared calamine, skin protection agents, rubber, latex products, raw materials and cementing agent in oil development.
Packing:25 kg/plastic bag
Indicator:HG/T2523-93
| Indicator | Indicator（Technical grade） | ||
| Excellent | First class | Qualified | |
Appearance |
White powder | ||
Amount（Zn,in dry basis ）      ≥％ |
57.5 | 57.0 | 56.5 |
Loss on ignition                              ％ |
25-28 | 25-30 | 25-32 |
Heavy metal                                ≤％ |
0.04 | 0.05 | 0.05 |
Moisture                                       ≤％ |
2.5 | 3.5 | 5.0 |
Sulphates                                    ≤％ |
0.6 | 0.8 | Â |
Fineness（75um sieve ）       ≥％ |
95.0 | 94.0 | 93.0 |
Cadmium                                    ≤％ |
0.1 | - | - |
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