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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Methyldopa and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Methyldopa impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Methyldopa-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Methyldopa

CAT No: CL-MYDP-01 CAS No: 555-30-6 Mol Wt: 211.22 Mol F: C10H13NO4 Inv Status: Custom Synthesis

Chemical Name: (2S)-2-Amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid

Methyldopa EP Impurity A

CAT No: CL-MYDP-02 CAS No: 6739-31-7 Mol Wt: 225.2 Mol F: C11H15NO4 Inv Status: Custom Synthesis

Chemical Name: (S)-2-Amino-3-(4-hydroxy-3-methoxyphenyl)-2-methylpropanoic acid

Methyldopa EP Impurity B

CAT No: CL-MYDP-03 CAS No: 65555-88-6 Mol Wt: 209.2 Mol F: C11H15NO3 Inv Status: Custom Synthesis

Chemical Name: (2S)-2-Amino-3-(4-methoxyphenyl)-2-methylpropanoic acid

Methyldopa EP Impurity C

CAT No: CL-MYDP-04 CAS No: 39948-18-0 Mol Wt: 239.3 Mol F: C12H17NO4 Inv Status: Custom Synthesis

Chemical Name: (2S)-2-Amino-3-(3,4-dimethoxyphenyl)-2-methylpropanoic acid

Methyldopa EP Impurity D

CAT No: CL-MYDP-05 CAS No: 2799-15-7 Mol Wt: 211.2 Mol F: C10H13NO4 Inv Status: Custom Synthesis

Chemical Name: (R)-2-Amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid

Methyldopa Impurity 2

CAT No: CL-MYDP-06 CAS No: 1269789-01-6 Mol Wt: 225.2 Mol F: C11H15NO4 Inv Status: Custom Synthesis

Chemical Name: (S)-2-Amino-3-(3-hydroxy-4-methoxyphenyl)-2-methylpropanoic acid

Methyldopa Impurity 4

CAT No: CL-MYDP-07 CAS No: 1212155-35-5 Mol Wt: 210.2 Mol F: C11H14O4 Inv Status: Custom Synthesis

Chemical Name: (S)-2-Hydroxy-3-(4-methoxyphenyl)-2-methylpropanoic acid

Alpha-Methyldopamine

CAT No: CL-MYDP-08 CAS No: 555-64-6 Mol Wt: 167.2 Mol F: C9H13NO2 Inv Status: Custom Synthesis

Chemical Name: 4-(2-Aminopropyl)benzene-1,2-diol

Methyldopa Impurity 1

CAT No: CL-MYDP-09 CAS No: 776-99-8 Mol Wt: 194.2 Mol F: C11H14O3 Inv Status: Custom Synthesis

Chemical Name: 1-(3,4-Dimethoxyphenyl)propan-2-one

Methyldopa Impurity 3

CAT No: CL-MYDP-10 CAS No: 1206669-95-5 Mol Wt: 210.2 Mol F: C11H14O4 Inv Status: Custom Synthesis

Chemical Name: (R)-2-Hydroxy-3-(4-methoxyphenyl)-2-methylpropanoic acid

Methyldopa O-Sulfate (Meta)

CAT No: CL-MYDP-11 CAS No: 72572-96-4 Mol Wt: 291.3 Mol F: C10H13NO7S Inv Status: Custom Synthesis

Chemical Name: (S)-2-Amino-3-(4-hydroxy-3-(sulfooxy)phenyl)-2-methylpropanoic acid

Racemate Methyldopa

CAT No: CL-MYDP-12 CAS No: 55-40-3 Mol Wt: 211.2 Mol F: C10H13NO4 Inv Status: Custom Synthesis

Chemical Name: 2-Amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid

Methyldopa Impurity 5

CAT No: CL-MYDP-13 CAS No: NA Mol Wt: 240.3 Mol F: C12H16O5 Inv Status: Custom Synthesis

Chemical Name: (S)-3-(3,4-Dimethoxyphenyl)-2-hydroxy-2-methylpropanoic acid

Methyldopa Sesquihydrate

CAT No: CL-MYDP-14 CAS No: 41372-08-1 Mol Wt: 211.2 : 3/2(18.0) Mol F: C10H13NO4 : 3/2(H2O) Inv Status: Custom Synthesis

Chemical Name: (2S)-2-Amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid sesquihydrate

Methyldopa Related Compound B (HCl salt)

CAT No: CL-MYDP-15 CAS No: 35026-10-9 Mol Wt: 209.2 : 36.5 Mol F: C11H15NO3 : HCl Inv Status: Custom Synthesis

Chemical Name: (S)-2-Amino-3-(4-methoxyphenyl)-2-methylpropanoic acid hydrochloride

Type:Impurity Reference Standard

Total Products: 15

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