Tannic Acid

Synonymes : Gallotannic acid, Tanninum, Acidum tannicum, Quebracho extract, Gallotannin, Chinese gallotannin, Tannic acid (USP).

Tannic acid is a naturally occurring polyphenol composed of a glucose core esterified with multiple gallic acid units, forming a high-molecular-weight gallotannin. Its dense array of phenolic hydroxyl groups enables strong hydrogen bonding and metal chelation, underpinning its astringent, antioxidant, and protein-precipitating properties.

Commercially, tannic acid is produced from gallnuts (quercus infectoria), sumac, or tara pods, then purified to meet pharmacopeial standards. It is supplied in technical, food, and pharmaceutical grades, with the latter conforming to USP/EP monographs. The compound is widely used in leather processing, wine clarification, pharmaceutical formulations (e.g., as an astringent or antidote), and as a reagent in analytical chemistry.

In B2B contexts, tannic acid serves as a versatile intermediate for gallic acid and pyrogallol production, a flocculant in water treatment, and a key component in corrosion inhibitors. Its ability to form insoluble complexes with proteins and alkaloids makes it valuable in detoxification and in the stabilization of beverages.

Structure chimique et propriétés

Tannic acid is a mixture of polygalloyl glucoses, typically containing 8–10 galloyl groups per molecule. The structure is characterized by a central glucose unit linked via ester bonds to gallic acid moieties. This configuration imparts strong reducing properties, the ability to precipitate proteins, and a characteristic astringent taste. It is stable under acidic conditions but hydrolyzes in the presence of strong acids or enzymes (tannase), releasing gallic acid.

Mécanisme d'action

• Protein binding: Forms insoluble complexes with proteins through hydrogen bonding and hydrophobic interactions, leading to astringency and precipitation.
• Metal chelation: Chelates metal ions such as Fe3+, Cu2+, and Zn2+, which contributes to its antioxidant and corrosion-inhibiting effects.
• Activité antioxydante: Scavenges free radicals and reactive oxygen species via its phenolic hydroxyl groups.
• Enzyme inhibition: Inhibits certain enzymes (e.g., hyaluronidase, collagenase) by binding to their protein structures.

Quality Specifications (QC Tests)

Bulk Supply & Documentation

• Capacité: 50 metric tons per month
• Délai de livraison: 3 à 5 jours ouvrés (articles en stock)
• Documentation: Certificat d'analyse (COA), fiche de données de sécurité (FDS) et fiche technique (TDS) disponibles sur demande
• Emballage: 25 kg fiber drums with double PE liners; custom packaging available

Foire aux questions

What is the MOQ for Tannic Acid?

Our minimum order quantity is 25 kg, but we can accommodate smaller trial orders upon request.

How long does delivery take?

For stock items, delivery is 3-5 business days after order confirmation.

Can you provide a COA and samples?

Yes, we provide a COA for each batch and can send samples for evaluation. Sample dispatch typically takes 1-2 days.

Contact & Ordering Information

• Company: LyvBio Co., Ltd.
• Address: Room 5-0203, Courtyard 205, Lianhu District, Xi’an, Shaanxi, China
• Email: info@lyvbio.com
• Phone: +86-29-65816888

send us your specification for a quotation.