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Product name: Dye tannic acid
Molecular formula: C76H52O46
Molecular weight: 1701.18
Structural formula:
Testing item | Unit | Specification |
appearance | __ | light yellow powder |
content | % | ≥83% |
loss on drying | % | ≤9.0 |
transparency | % | ≥53.0 |
water insolubles | % | ≤0.5% |
gallic acid | % | ≤7.0 |
production scale | __ | 600T/Y |
packing | Cardboard drums for external use and plastic bags for internal use. | |
Character: This product is light yellow to light brown powder, with special smell and astringent taste. Soluble in 1 part water or ethanol, soluble in acetone, insoluble in chloroform or ether.
Quality index: the product conforms to national standard GB5308-85.
To use: As a fixing agent, mordant, fibre deodorant and synthetic dye in textile printing and dyeing.
Storage: keep away from moisture and light and store sealed
Packing: plastic inner and paper drums of 25 kg net per barrel
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