Hubei Tianxin Biotech Co., Ltd. sell "Tannic Acid"

Tannic acid (also called tannin or gallic tannin) has molecular formula C76H52O46, a molecular weight of 1434-1701.18, and CAS number 1401-55-4. It appears as a light yellow to light brown powder that darkens and becomes bitter when exposed to air, is odorless, and dissolves in water, ethanol, acetone, and ethyl acetate. It serves as a raw material for producing gallic acid, pyrogallic acid, and sulfa drugs; as a mud treatment agent in the oil industry; and in leather tanning agents, mordants, rubber coagulant protein agents, alkaloid precipitants, beneficiation inhibitors, alcohol clarifying agents, germanium extraction/preparation, and blue-black ink production. It is packed in 25kg woven bags or 25kg fiber drums with inner plastic liners and should be stored away from moisture and light in a sealed container.