... bad smell; acerb taste; soluble in water, alcohol, acetone and ethyl acetate. 5.Specification: Comply strictly with China national standard of ... (3,4,5-Trihydroxybenzoic acid),Pyrogallol(1,2,3-Benzenetriol),Ethyl gallate, Progyl Gallate, n-Octyl gallate,3,4,5-Trimethoxybenzaldehyde ...