Cinnamic acid   CAS: 621-82-9Molecular formula:    C9H8O2Molecular weight: 148.16  Appearance: White to light yellow crystal powder  Fragrance: Unique scent  Purity:  ≥99%  Melting point: 132.5-134.5℃ Heavy metals:  ≤10ppm  Residue on ignition:  ≤0.1%  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