Propyl Gallate Food Grade 99%. A safe antioxidant for food, feed, pet food, cosmetics. Propyl Gallate Food Grade (E310) 99% Synonyms:Propyl gallate, propyl ester of gallic acid, n ... -propyl ester of 3,4,5-trihydroxybenzoic acid, propyl 3,4,5-trihydroxybenzoateMolecular ...