1. Pharmaceutical Applications

Tannic acid acts as an effective astringent and antiviral agent. It is used in topical creams, anti-diarrheal formulations, and even in oral care products. Due to its natural composition, tannic acid is also favored in herbal medicine and homeopathy.

 2. Cosmetics and Skincare

Thanks to its antioxidant properties, tannic acid is used in skin-tightening formulations, anti-aging serums, and toners. It helps reduce pores, protect against UV damage, and balance oily skin.

3. Food & Beverage Industry

Tannic acid plays a major role in the clarification of wine, beer, and juices. It acts as a stabilizer and flavoring agent, particularly in beverages that require a bitter or dry profile. It is also used as a natural preservative in food products.

4. Metal Treatment and Corrosion Inhibition

Tannic acid is widely used in rust converters and metal surface treatment. It reacts with iron to form a protective coating, making it ideal for preserving artifacts, pipelines, and industrial machinery.

5. Leather Tanning

One of the traditional uses of tannic acid is in the tanning of leather. It helps bind proteins and improve the durability, texture, and water resistance of leather products.

6. Ink and Dye Manufacturing

In the ink industry, tannic acid is used to create iron gall ink—popular for archival documents. It also works as a mordant in textile dyeing, helping fix the dye to fabric fibers.

7. Agriculture and Animal Feed

Tannic acid is used in livestock feed to improve digestion and reduce bacterial infections. It’s also being studied as a natural pesticide and soil conditioner in organic farming.