Name: Tannic Acid

English name: Tannic acid

Other names: Tannin; Tannin; Gallic tannin

Chemical formula: C76H52O46

Molecular weight: 1701.20

CAS registration number: 1401-55-4

EINECS accession number: 215-753-2

Melting point: 218°C

Water solubility: 250 g/L (20 ℃)

Exterior view: light yellow to light brown amorphous powder or loose shiny scaly or spongy solid

Flash point: 199℃

Application: mordant; ore flotation agent; conversion coating; food additive; synergist; deodorant

use

1. It can be used as food antioxidant. It is generally mixed with vitamin E, vitamin C or gallic acid before use. Tannin is used as a viscosity reducer and fluid loss reducer for water-based drilling fluids, and can improve the quality of filter cake.

2. Mainly used in medicine, ink, printing and dyeing, leather and metallurgy industries and water treatment. Tannin has the functions of flocculation, deoxidation, scale inhibition and sterilization in the water treatment process.

3. It can be used as a clarifying agent for low-alcohol wine and fruit wine. It can also be used as a leather tanning agent.

4. Tannic acid is used for chromium-