Supply Gallnut Extract Tannic Powder Tannic Acid CAS 1401-55-4 Gallotannic Acid

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. The addition of 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 chemically treat pig and cow hides with tannic acid, which can coagulate the soluble proteins in the hides. So, the raw leather that would have smelled and rotted in a few days turned into beautiful, clean, flexible, and durable leather. This tanning process is called leather tanning.

Tannic acid is a specific form of tannin, a type of polyp-henol. Its weak acidity (pKa around 6) is due to the numerous p-henol groups in the structure. The chemical formula for commercial tannic acid is often given as C76H52O46, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. 

1.Industrial grade:
(1). Produce paint and blue ink.
(2). Tannic acid has the activity of reacting with proteins, polysaccharides, alkaloids, microorganisms, enzymes and metal ions. It can be used for tanning raw leather and transforming it into leather. It has the characteristics of anti-oxidation, capturing free radicals, bacteriostasis and derivatization.
(3). Tannic acid can combine with protein to form water-insoluble tannin protein. Therefore, adding tannic acid to shampoo can prevent the dissolution of hair fiber protein and protect hair. Using tannic acid in nail products can increase nail strength. For skin care products, it can prevent sun and brighten the skin.
(4). It is used in the process of water treatment and has the functions of flocculation, deoxidation, scale inhibition and sterilization.
(5). It can be used as viscosity reducer and fluid loss reducer of water-based drilling fluid, and can improve the quality of filter cake.

2.Food grade:
(1). Used as food antioxidant. It is generally used after mixing with vitamin E, vitamin C or gallic acid.
(2). Used as clarifier of low alcohol wine and fruit wine.

3.Pharmaceutical grade: 
Tannic acid has astringency and antibacterial properties. It is clinically used to treat local bleeding. It can be used in toothpaste to protect teeth and prevent gum bleeding.