L-Dopa；3-(3,4-Dihydroxyphenyl)-L-alanine；Levodopa；3-Hydroxy-L-tyrosine

CAS No.: 59-92-7

C9H11NO4=197.19

Grade: BR

Content: ≥ 98.0%

Loss on drying: ≤ 5.0%

Burning residue: ≤ 5.0%

Arsenic salt: ≤ 3ppm

Heavy metals: ≤ 8ppm

Physicochemical properties: white or off white crystalline powder. It is a non protein amino acid. L configuration, melting point 276 ~ 278 ℃ (decomposition). The optical rotation is -13.1 ° (c=5.12, 1mol/l hydrochloric acid), easily soluble in dilute hydrochloric acid and formic acid, slightly soluble in water, insoluble in ethanol, benzene, chloroform and ethyl acetate, odorless, tasteless, and blackened in the air. In animals, DOPA is converted into dopamine by dopa decarboxylase

Purpose: biochemical research. Substrates of tyrosinase, aromatic L-amino acid decarboxylase and lactoperoxidase

Storage: 2 ~ 8 ℃, away from light