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Synonyms: tannic acid, tannin, gallnut tannic acid
Molecular formula and molecular weight:C76H52O46 1701.18
Properties: Light yellow to light brown powder, and has special smell, astringent. It could be dissolved in 1 share of water or ethyl alcohol and Aceton, instead of chloroform or diethyl ether.
Specification:British Pharmacopeia 1993, USP 1995
Uses: It has antibacterial, eliminating enzyme and converging action for antibiotic, treating ringworm, disintoxicating and synthesizing sulfanilamide synergist.
Storage: Stored in an airtight container.
Package: Inner plastic and outer woven bags, 25 kg net weight per bag.
Quality standard:
|
Tannic Acid content% |
≥ 86% |
|
Water insoluble matter |
0.2% |
|
Dry weightlessness |
≤ 9% |
|
Clarification of aqueous solution |
accord with |
|
Gum and dextrin |
accord with |
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Ignition residue |
≤ 0.2% |
|
Gallic acid content |
≤ 7% |
