Product Name: Tannic acid
Alias: Tannic Acid , Tannin, Gallic Tannin
Molecular Formula: C76H52O46
Molecular Weight: 1701.18
Property : Light yellow or light brown powder, oxidized in the air, the color becomes darker, odorless and astringent. It is soluble in water, ethanol, acetone, ethyl acetate, but insoluble in chloroform or ether.
Specifications: Comply with national industry standards LY-T 1300, LY-T1640, LY-T1641; US Food and Drug Administration “Food Chemistry Specification” 5th edition and US Food Chemistry Code standards; US Food Standards; British Pharmacopoeia.
Technical index:
| Specification | Industrial grade | Pharmaceutical grade | Food grade |
| Appearance | Yellow powder | Light yellow powder | Light yellow powder |
| Content | ≥81% | ≥90% | 93%-98% |
| Loss on drying | ≤9% | ≤9% | ≤9% |
| Residue on ignition | —— | ≤1% | ≤1% |
| Heavy metal | —— | ≤30ppm | ≤20ppm |
| Other Index | See COA | See COA | See COA |
Uses:
(1) Used for the extraction of germanium, the manufacture of acid iron ink, metal rust removal, and the raw material of mud treatment agent for oil drilling. It can produce gallic acid and pyrogallic acid, and can also be used as leather tanning agent, mordant, rubber coagulant, protein agent, alkaloid precipitation agent.
(2) Medicinal tannic acid has antibacterial, enzyme-removing and astringent effects. It is used in antibacterial, tinea, detoxification, dysentery and other medicinal preparations, and also used to synthesize sulfonamide synergists.
(3) Used in cosmetics, food antioxidants, clarifying agents for low alcohol alcohols, oil antioxidants, and also used in bromelain food processing.
Storage: Avoid moisture and light, sealed tightly, no contact with metal.
Product validity: two years.
Packing: Packed in kraft paper bag or cardboard drum, net weight 25 kg.