Bismuth subgallate is a basic bismuth salt of gallic acid, typically represented as a coordination compound between bismuth and gallate groups. It appears as a yellow to yellow-brown, fine crystalline powder and is characterized by its very low solubility in water and most organic solvents. The compound is chemically stable and exhibits astringent and mild antimicrobial properties, which has led to its use in pharmaceutical, medical, and specialty chemical applications