... , 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- ... odourless solidSolubilitySlightly soluble in water; freely soluble in ethanol, ether and propane-1,2-diolAssay(on dry base)98.0 ...