... -trihydroxybenzoate Structural formula: Molecular formula & Molecular weight:C10H12O5;212.21 Propyl Gallate Appearance: white to milky white crystalline granules Quality index: in ... ,5-Trihydroxybenzoic acid),Pyrogallol(1,2,3-Benzenetriol),Ethyl gallate, Progyl Gallate, n-Octyl gallate,3,4,5-Trimethoxybenzaldehyde,Methyl 3,4,5 ...