tannins are naturally occurring polyphenolic compounds found in various plants. they are known for their ability to bind and precipitate proteins, which makes them important in various industrial and medicinal applications. tannins are responsible for the astringency in certain fruits, wines, and teas.
chemical properties
molecular weight: varies depending on the specific tannin compound
density: typically around 1.2-1.5 g/cm³
boiling point: decomposes before boiling
solubility: soluble in water, alcohol, and acetone
optical rotation: varies depending on the specific tannin
chemical formula: varies; common formulas include C76H52O46 for some hydrolyzable tannins