Composition 3,4,5 – trihydroxybenzoic acid.
Basis Gallic Acid
Empirical Formula C₇H₆O₅
Formula Weight 170.14
Appearance white – cream crystalline hygroscopic powder.
Solubility Slightly soluble in water and alcohol, freely soluble in acetone, ethyl acetate.
Appearance of Solution
5% solution in ethanol is clear and not more coloured than reference standard solution. Clear solution on dissolving at 20% in boiling water.