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China, Chinese High Quality Tannic Acid Gallotannic Acid CAS 1401-55-4 with Lowest Price Powder1 Industrial Products Supplier Manufacturer Details, price list catalog:
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AdditiveOther AdditivesTannic Acid1401-55-4
Dalian Eastland International Trading Co., Ltd.
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Product Description Tannic acid, also known as tannic acid, is an organic compound with the chemical formula C76H52O46. It is a yellow or brownish yellow powder, and its aqueous solution turns blue black when it meets an iron salt solution. Adding sodium sulfite can delay the color change. In industry, tannic acid is widely used in tanning leather and manufacturing blue ink. Tannic acid can coagulate proteins. People use tannic acid to chemically treat raw pigskin and cowhide, which can solidify the soluble proteins in the raw skin. So, the raw leather that would have smelled and rotted after a few days turned into beautiful, clean, flexible, and durable leather. This tanning process is called leather tanning.ItemsTypical ValuesMelting point218 °CBoiling point862.78°CDensity1.2965FEMA3042 | TANNIC ACID (QUERCUS SPP.)Refractivity1.7040Flash point198°CColourYellow to light brownOdorSlight in solution, typical tannic acidPH3.5 (100g/l, H2O, 20°C)SOLUBLE250 g/L (20 oC)IARC3 (Vol. 10, Sup 7) 1987
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