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By certification 
Appearance：White or white-like powder.
Identify：A B C conformed
Loss on drying:max 0.5%
Clearity：maxBY6
Cl -：max 0.035%
Sulfate Ash：max 0.1%
Free nicotinate acid：max0.8ml/g
Lead or Heavy metals：max 0.001%
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Appearance：White or white-like powder.
Identify：A B C conformed
Loss on drying:max 0.5%
Clearity：maxBY6
Cl -：max 0.035%
Sulfate Ash：max 0.1%
Free nicotinate acid：max0.8ml/g
Lead or Heavy metals：max 0.001%
