Used as an antioxidant in food and pharmaceutical industries to prevent oxidation and extend shelf life. Commonly found in beverages, oils, and cosmetic formulations for its ability to scavenge free radicals. Employed in tanning leather due to its astringent properties. Also utilized in the synthesis of dyes and inks, particularly for making iron gall ink. Shows antimicrobial activity, making it useful in preservatives. Investigated for potential health benefits, including anti-inflammatory and anticancer properties, in research and nutraceutical applications.