... 4,5-Trimethoxy benzoic acid Structural formula: 3,4,5-Trimethoxy benzoic acid Molecular formula & Molecular weight: C10H12O5; 212.2 Appearance: white ... on dry : ≤0.5%,Residue on ignition: ≤0.2% Uses: Pharmaceutical intermediate, mainly used in pharmaceutical synthesis Storage ... are:Tannic Acid(Pharmaceutical/Tech/Dyes/Food Grade),Gallic acid(3,4,5-Trihydroxybenzoic acid),Pyrogallol(1,2,3-Benzenetriol ...