Tannic acid, a polyphenolic compound, is primarily derived from various plant sources, including oak bark, chestnut, and sumac. It has the chemical formula C₁₄H₁₀O₁₁ and is known for its ability to form complexes with proteins, carbohydrates, and alkaloids. This natural substance appears as a yellowish or brownish powder and has been traditionally used in tanning leather due to its astringent properties. Beyond its applications in the textile industry, tannic acid is also utilized in food and beverage processing, medicinal formulations, and as an antioxidant in various products, highlighting its versatile nature.