Organic Acids
REACH
Tannic acid
CAS Number
72401-53-7
What is Tannic acid?
Tannic acid (CAS 72401-53-7), also commercially known as tannin, is a plant-derived polyphenolic compound used in food, industrial, and pharmaceutical manufacturing.
Where is Tannic acid used?
- Food and beverage: fining agent for wines, beers, and fruit juices, clarifying liquids by precipitating haze-forming proteins
- Pharmaceutical and nutraceutical: antioxidant stabilizer protecting active ingredients from oxidative degradation
- Leather processing: cross-links collagen fibers during vegetable tanning, producing firm, durable leather without synthetic tanning agents
- Water treatment: coagulant and metal chelator that binds heavy metal ions and assists in suspended solids removal
- It functions as an antioxidant, chelating agent, and protein-precipitating agent.
Commercial specifications
- Purity levels typically ranging from 95% to 99%
- Bulk quantities in fiber drums or multi-layer bags
Other Names (Synonyms)
D-glucopyranose, 1,2,3,4,6-pentakis[3,4-dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoate]|D-glucopyranose, pentakis[3,4-dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoate]|[2,3-dihydroxy-5-[[(2r,3r,4s,5r)-3,4,5,6-tetrakis[[3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoyl]oxy]oxan-2-yl]methoxycarbonyl]phenyl] 3,4,5-trihydroxybenzoate