... -6Molecular formula: C4H6O4Mmolecular weight: 118.09Character: White Crystallization, melting point185 boiling point 235,specific gravity1.572; slightly soluble in alcohols,ether and ... , food gradeAppearancecolorless or white crystallization powderPurity99.0% min99.5% minMelting Point 185.0~190.0185.0~189.0Heavy Metal0.002% max0 ...