|Product name:||Tannin Acid|
|Product introduction:||Tannin is a type of tannin found in Gallnut.?Yellow or light brown light amorphous powder or scales; odorless, slight special odor, very astringent taste.Soluble in water and ethanol, soluble in glycerol, almost insoluble in ether, chloroform or benzene.?The aqueous solution meets the iron salt solution to turn blue-black, and sodium sulfite can delay discoloration.?In industry, tannic acid is widely used in tanning and manufacturing blue ink.?Citric acid can coagulate proteins.?Raw pigskin and raw hides are chemically treated with tannic acid to coagulate soluble proteins in hides.?As a result, the raw hides, which had been smelling and rotted for a few days, turned into beautiful, clean, flexible and durable leather.?This tanning process is called leather tanning.|
|Quality Standard:||Complies with national standards LY/T1300-2005, LY/T1640-2005, LY/T1641-2005 and FCC, USP, EP, BP|
|Properties:||Pale yellow to light brown amorphous powder or loose glossy scaly or spongy solid that becomes dark when exposed to air.?Odorless, slightly special odor, with a strong astringency, exposed to light an|
1. Industry: Widely used in the wetting of acid iron inks, metal rust prevention, and oil drilling mud treatment.
|Product category:||Gallnut series|