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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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