... : 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-Molecular Formula: C15H10O7Molecular Weight: 302.23Chemical Structure:Physical ... anhydrous ethanol, or 23ml of glacial acetic acid, yellow alkaline solution, almost insoluble in water, very bitter taste in ethanol.Descriptions ... : 20 max.Ash, %: 0.2 max.Loss on drying, %: 9.5-12.5Assay, %: 99.0 min.MicrobialTotal plate count, pc/g: 1000 ...