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Synonyms: tannic acid, tannin, gallnut tannic acid
Molecular formula and molecular weight:C76H52O46 1701.18
Properties: Light yellow or light brown amorphous powder; Exposed to oxidation in the air, deep color, odorless, astringency. Soluble in water, ethanol, acetone, ethyl acetate.
Quality index: The product complies with the national standard GB5308-85.
Uses: The raw materials of pharmaceutical diphenic acid, triphenic acid and sulfonamide are prepared. In chemical production, gallic acid and coke gallic acid can be produced. Used as mud treatment agent in petroleum industry. In addition, it can be used in the production of leather tanning agent, media dye, rubber coagulant, protein agent, alkaloid precipitator, beneficiation inhibitor, alcohol clarification agent, germanium extraction and blue and black ink preparation, etc.
Storage: Stored in an airtight container.
Package: Inner plastic and outer woven bags, 25 kg net weight per bag.
Quality standard:
|
Tannic acid content |
≥ 81 |
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Dry weightlessness% |
≤ 9 |
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Aqueous Solut on State |
Below micro corrosion |
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Specific absorbance |
≥ 420 |
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Gallic acid content |
≤ 7 |
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Total color |
≤ 2.0 |
