This is made from chosen wood chips with the procedures of carbonization, activation, pickling, etc. It has the advantages of large surface area, strong adsorption, high purity, etc.
This is usually applied to decolorizing and refining in the area of pharmacy, chemical industry, food and beverage, etc.
It conforms to the standard of Chinese Pharmacopoeia 2015, Volume 2.
|
Spec.
|
767
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|
Character
|
|
Black powder: odorless, tasteless, no grittiness
|
|
Quinine sulfate adsorption
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≥ mg/g
|
120
|
|
Methylene blue adsorption
|
≥ ml/g
|
120
|
|
PH value
|
|
4.5-7.5
|
|
Loss on drying
|
≤ %
|
10
|
|
Chloride
|
≤ %
|
0.1
|
|
Sulfate
|
≤ %
|
0.05
|
|
Sulfide
|
|
No reaction
|
|
Cyanide
|
|
No reaction
|
|
Ferric salt content
|
≤ %
|
0.02
|
|
Dissolved in acid
|
≤ %
|
0.8
|
|
Residue on ignition
|
≤ %
|
3
|
|
Uncarbonized matter
|
|
Uncolored
|
|
Heavy metal
|
≤ ppm
|
30
|
|
Water soluble zinc salt
|
≤ %
|
0.005
|
