Propyl Gallate . Propyl Gallic acid Byname: PG CAS :121-79-9 Molecular formula and weight( based on 1983 international atomic weight ) Molecular formula: C10H12O5 Molecular weight: 212.21 Properties:White to light brown crystalline powder, odorless, soluble in 1000-share water, 3-share aether or 2000-share peanut oil, soluble in ethanol, propanol, aether, chloroform, slightly soluble in water. Use:Widely used in food industry, pharmaceutical preparation. It is a kind of excellent oil antioxidant, used in cosmetics and ultraviolet radiation inhibitor etc.. Specification:in accordance with GB3263 - 82 Main technical index: Index name National standard Factory standard Content % 98-102 99.70-100.5 Range of melting point °C 146-150 146-149 Arsenic salt (As) % ≤ 0.0003 0.0003 Heavy metal (Pb) % ≤ 0.001 0.001 Loss on drying % ≤ 0.5 0.50 Residue on ignition % ≤ 0.1 0.05 Chromatic number APHA ≤ 50 50