3,5-DIHYDROXYBENZOIC ACID
3,5-Dihydroxybenzoic acid, also known as α – resorcinol formic acid, chemical formula C7H6O4, CAS number 99-10-5, molecular weight 154.12. Appearance: white or light pink needle shaped crystals, melting point 232-233 ℃, boiling point 411.5 ℃, solubility in water 84g/L (20 ℃), easily soluble in ethanol, ether, and acetone