High Quality Tannic Acid Gallotannic Acid CAS 1401-55-4 with Lowest Price Powder

• Customization: Available
• Appearance: Powder
• Environmental Protection: No
• Model NO.: EVA 20240904
• Kind: Fixing Agent
• Application: Post-Processing Auxiliary
• Transport Package: Bag
• Specification: 25KG
• Trademark: custom
• Origin: China
• Production Capacity: 10000 Kilogram/Kilograms Per Month

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.

Items	Typical Values
Melting point	218 °C
Boiling point	862.78°C
Density	1.2965
FEMA	3042 | TANNIC ACID (QUERCUS SPP.)
Refractivity	1.7040
Flash point	198°C
Colour	Yellow to light brown
Odor	Slight in solution, typical tannic acid
PH	3.5 (100g/l, H2O, 20°C)
SOLUBLE	250 g/L (20 ºC)
IARC	3 (Vol. 10, Sup 7) 1987