L-Methyl Dopa

Identification

Synonyms: Aldomet; Methyl-DOPA; 3-(3,4-Dihydroxyphenyl)-2-methyl-L-alanine, sesquihydrate;  L-(-)-3-(3,4-dihydroxyphenyl)-2-methylalanine; L-alpha-methyl-3,4-dihydroxyphenylalanine; dopamet; dopatec; dopegyt; L-(alpha-md); (-)-methyldopa; L-methyldopa; L-alpha-methyldopa; alpha-methyl-L-dopa; 3-hydroxy-alpha-methyl-L-tyrosine; 3-hydroxy-alpha-methyl-L-tyrosine sesquihydrate;  aldometil; aldomin; alpha medopa; hyperpax; medomet; medopren; methoplain; presolisin; sedometil; sembrina; medopa; 3-hydroxy-alpha-methyltyrosine; alpha-Methyl-DOPA sesquihydrate; 2-Methyl-3-(3,4-dihydroxyphenyl)-DL-alanine

CAS No.: 555-30-6

Molecular Weight:  211.217

Molecular Formula: C10H13NO4

Structural Formula:   _.3/2 H₂O

Application

Anti-hypertension drug.

USP24

Item	Specification
Assay (Titrimetric method)	98.0~101.0%
Appearance	White crystalline powder
Specific Rotation	-25˚~ -28˚
Water (W/W)	10.0~13.0%
Residue on ignition	0.10% max
Heavy metals	10 ppm max
Acidity (0.1N NaOH)	0.50 ml/g max
3-o-Methyl Methyldopa	0.50% max
Organic volatile impurities	According to USP24

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