Levodopa

Features: 1) Levodopa (L-Dopa, L-Tyrosine, Larodopa, Dopar) 2) CAS no.: 59-92-7 3) Standard: BP2002, USP 24, EP4 4) Molecular formula: C9H11NO4 5) Molecular weight: 197.19 Packing: 25kg/drum Specifications: 1) Appearance: white or slightly cream crystalline powder, odorless 2) Identification: I.R: positive 3) Solubility: meets the requirements 4) PH: 4.5 7.0 5) Color of solution: meets the requirements 6) Organic volatile impurity: meets the requirements 7) Light absorption: 137 147o 8) Optical rotation (BP2002): -1.27 -1.34o 9) Specific rotation (USP24): -160 -167o 10) Heavy metals (BP2002): 10ppm max., USP24 20ppm max. 11) Related substances (BP2002): meets the requirements 12) 3-(3,4,6-Trihydroxyphenyl) alanine (USP24): 0.1% max. 13) 3-Methoxytyrosine (USP24): 0.5% max. 14) Loss on drying: 1.0% max. 15) Residue on ignition: 0.10% max. 16) Residual solvent: Ethanol: 1.0% max. 17) Assay (on dry basis): 99.0 101.0%