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Tannic Acid
SINOBIO
2916399090
Name: Tannic Acid
CAS: 1401-55-4
Chemical formula: C76H52O46
Appearance: Amorphous Light brown powder
Tannic acid, also known as tannin acid, is a natural hydrolyzable polyphenol extracted from Chinese gallnuts, sumac and plant bark, registered CAS 1401-55-4. Our factory adopts closed low-temperature extraction, membrane filtration and vacuum spray drying technology to produce three complete grades: food grade, industrial grade and pharmaceutical grade, with strict separation of production lines to avoid cross-contamination.
This raw material features strong protein binding capacity, natural antioxidant and broad-spectrum antibacterial effects, and delivers stable performance under acidic processing conditions. Unlike synthetic additives, plant-derived tannic acid is biodegradable with low environmental burden. Different grades are tailored to match diverse industry standards: high-purity food grade meets FDA GRAS & EU food additive norms; pharmaceutical grade complies with USP/BP pharmacopoeia limits; cost-effective industrial grade serves leather, printing and water treatment mass production.
The chemical formula for tannic acid is typically represented as C₇₆H₅₂O₄₆, corresponding to decagalloyl glucose; however, it is actually a mixture formed by the esterification of 2–12 galloyl groups with glucose or quinic acid. Its molecular weight is approximately 1701.2 g/mol, containing multiple phenolic hydroxyl groups (-OH), which confer weak acidity (pKa ≈ 6) and strong reducing properties.
-Appearance: Light yellow to brownish-yellow amorphous powder that gradually darkens when exposed to air and light.
-Solubility: Soluble in hot water, ethanol, and acetone; insoluble in ether.
-Odor and taste: Odorless or with a slight characteristic odor; extremely bitter taste (due to its ability to precipitate when combined with proteins).
Tannic Acid is widely found in plants, especially:
- Trees: such as the bark and fruit (acorns) of oak trees (Quercus spp.) and the galls of sumac (Rhus semialata).
- Fruits and nuts: unripe persimmons, pomegranates, grape seeds, tea leaves (especially black tea), and coffee beans.
- Other plants: Tara pods, and the sap of the lacquer tree (Toxicodendron vernicifluum).
*Wine, beer, fruit juice: Clarifying agent to remove haze protein, improve liquid transparency and extend shelf life
*Chocolate, jam, canned food: Natural antioxidant & color stabilizer, prevent fat rancidity
*Tea, functional drinks: Flavor modifier & anti-browning additive, approved food additive E181
*Topical ointment, suppository, wound care: Astringent, hemostatic and anti-inflammatory for minor burns, dermatitis and diarrhea relief
*Oral care raw material: Anti-plaque agent in mouthwash and toothpaste
*Capsule excipient: Stabilizer for herbal extract formulations
*Leather tanning core raw material: Combine with animal skin protein to make leather soft, wear-resistant and glossy
*Textile printing & dyeing: Mordant to enhance color fastness of plant dyes
*Industrial wastewater treatment: Metal ion chelating precipitant for heavy metal removal
*Mineral flotation agent, anti-corrosion additive for metal surface treatment
Natural antioxidant & astringent for toner, mask and anti-acne cream; shrink pores, inhibit bacterial reproduction and delay skin oxidation aging.
Food grade has ultra-low heavy metal, arsenic and microbial indicators, certified for food contact; industrial grade relaxes impurity limits, mainly used for leather and wastewater treatment, not edible.
Yes, food-grade tannic acid is approved by global food authorities, only precipitates excess protein and will not affect wine flavor.
High concentration causes mild irritation; pharmaceutical grade diluted to standard dosage is safe for topical skin care and wound treatment.
Sample order 1–5kg, bulk order 1 ton; contact us to get factory wholesale price.
COA, MSDS, food safety test report, Halal, ISO22000, GMP certification.
