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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, with obscure flavor; It could be dissolved in 1 share of water or ethyl alcohol and Aceton, instead of chloroform or diethyl ether.
Uses: Used as the dye-fixing agent, dye mordant, fiber deodorization agent and synthetic dyestuff in the textile printing and dyeing.
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 |
|
Drying weightlessness% |
≤ 9 |
|
Aqueous Solution State |
Below micro corrosion |
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Specific absorbance |
≥ 420 |
|
Gallic acid content |
≤ 7 |
|
Total color |
≤ 2.0 |
