Before revision: Tannic acid, a type of tannin Tannin powder (mixture of compounds) A bottle of tannic acid solution in water Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids.
After revision: Representative chemical structure of a tannic acid, a type of tannin Tannin powder (mixture of compounds) A bottle of tannic acid solution in water Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids.