Properties: Pale yellow or light brown amorphous powder; oxidizes and darkens when exposed to air; odorless with astringent taste. Soluble in water, ethanol, acetone, and ethyl acetate.
Tannic Acid Molecular Structure:

Properties: Pale yellow to light brown powder with distinctive odor; extremely astringent taste; soluble in 1 part water or ethanol, soluble in acetone, insoluble in chloroform or ether.
Quality Specifications: Complies with British Pharmacopoeia 2012, United States Pharmacopeia 2013.
Storage: Store in a sealed container, protected from moisture and light
Packaging: Plastic-lined fiberboard drum, net weight 25 kg per drum

Pharmaceutical Industry: Pharmaceutical tannic acid applications in medicine are primarily based on its pharmacological activity.
‌Topical Treatment‌: With its astringent properties, tannic acid binds with proteins to form insoluble complexes, commonly used to treat minor skin wounds, burns and ulcers as a local astringent. Its hemostatic properties also make it suitable for local hemostasis after oral surgery.‌
‌Oral Adjunctive Treatment‌: Tannic acid can be used as adjunctive treatment for gastrointestinal discomfort, such as diarrhea.‌
‌Detoxification and Cardiovascular Effects‌: Tannic acid can serve as an antidote for alkaloid and certain heavy metal ion poisoning, reducing body absorption through chelation and precipitation. Its ability to complex with calcium ions can resist smooth muscle calcium-induced contraction, helping to lower blood pressure.‌