Tannic acid is a specific commercial form of tannin, a type of polyphenol. Its weak acidity (pKa around 10) is due to the numerous phenol groups in the structure.
Similarly tannic acid can also be used as an aftertreatment to improve wash fastness properties of acid dyed polyamide. It is also an alternative for fluorcarbon aftertreatments to impart anti-staining properties to polyamide yarn or carpets.
Tannic acid is used in the conservation of ferrous (iron based) metal objects to passivate and inhibit corrosion. Tannic acid reacts with the corrosion products to form a more stable compound, thus preventing further corrosion from taking place.
Use of tannic acid in food applications is far more widespread[clarification needed] and significant amounts are used as process aids in beer clarification, aroma compound in soft drinks and juices. Equally important are applications in the wine industry, where it finds use as a natural clarifying agent, colour stabilizer and taste enhancer.
Tannic Acid is one of the popular food additives and ingredients in most countries.As a professional Tannic Acid supplier and manufacturer of food additives, Foodchem International Corporation has been supplying quality Tannic Acid to customers all over the world for over 10 years. If you have any questions or wish to receive a quote, please feel free to reach us by email: firstname.lastname@example.org or by phone: +86 21 2206 3075. Our sales person will get back to you in 1 working day.