Cinnamic acid CAS: 621-82-9 Molecular formula: C9H8O2 Molecular weight: 148.16 Appearance: White to light yellow crystal powder Fragrance: Unique scent Purity: ¡Ý99% Melting point: 132.5-134.5¡æ Heavy metals: ¡Ü10ppm Residue on ignition: ¡Ü0.1% Usage: The main use of cinnamic acid is in the manufacture of the methyl, ethyl, and benzyl esters for the perfume industry. Ethyl ester used in glass prisms, lenses. Some esters, such as chaulmoogryl and other derivatives, are used in medicine. Packing: 25kg/plastic bag