Company Information
Member Since 7 Years
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product name:Â zinc carbonate
purity:Â 57.5%
appearance:Â white powder
grade standard:Â rubber grade
cas no.:5263-02-5
einecs no.:Â 222-477-6
molecular formula:Â znco3.2zn(oh)2.h2oÂ
molecular weight:Â 324.15
Â
zinc carbonate properties:
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.
inspection:
item | index | ||
high-class | first-class | qualified | |
zn  %  ≥ | 57.5 | 57.0 | 56.5 |
loss on dry | 25.0-28.0 | 25.0-30.0 | 25.0-32.0 |
pb content %  ≤ | 0.04 | 0.05 | 0.05 |
moisture      ≤ | 2.5 | 3.5 | 5.0 |
so4   %  ≤ | 0.60 | 0.80 | - |
fineness through 75 um screen ≥ | 95.0 | 94.0 | 93.0 |
cd content    %  | 0.10 |  |  |
packaging & delivery:
packaging:Â Â 25kg/bag
delivery time:Â within 7-20 working days after received advance payment.
storage:  zinc carbonate is stored in a cool,  dry warehouse . every package is sealed , preventing air oxidation as well as moisture.
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