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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Levodopa, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Levodopa impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Levodopa-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Levodopa Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-O-Methyldopa-d3 Stable Isotopes CS-O-02682 586954-09-8 In Stock
Foslevodopa-d3 Stable Isotopes CS-O-59115 97321-87-4 (Unlabeled) Enquire
L-Dopa-2,5,6,a,b,b-d6 Stable Isotopes CS-C-01365 713140-75-1 Enquire
Levodopa-d3 Stable Isotopes CS-O-02700 53587-29-4 In Stock
Levodopa-D3 Deuterium Chloride Stable Isotopes CS-EO-02437 Not Available Enquire
3-O-Methyldopa d3 (Phenyl-d3) Stable Isotopes CS-C-00885 300-48-1 (Unlabelled) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Levodopa API CS-O-01774 59-92-7 In Stock
Melevodopa API CS-O-01847 7101-51-1 In Stock
Dopaquinone Sulphate API CS-O-45964 1797832-49-5 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
rac 3-O-Methyl DOPA Metabolite CS-EK-01065 7636-26-2 In Stock
Levodopa Sulphate Metabolite CS-O-30480 217657-34-6 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Methoxy-L-tyrosine Impurity CS-BX-00607 300-48-1 In Stock
3-Methoxytyrosine Impurity CS-O-57692 7636-26-2 Enquire
3-O-Methyl-L-DOPA Monohydrate Impurity CS-T-33695 200630-46-2 Enquire
L-dopa ethyl ester hydrochloride Impurity CS-T-94212 39740-30-2 Enquire
Levodopa EP Impurity D Impurity CS-O-10846 5796-17-8 In Stock
Levodopa Impurity 27 Impurity CS-O-60537 25312-42-9 Enquire
Levodopa Related Compound A Impurity CS-T-27246 27244-64-0 In Stock
3-Acetyl-L-tyrosine Hydrochloride Impurity CS-T-64839 32404-28-7 Enquire
L-DOPA Isopropyl Ester Impurity CS-T-21311 110301-07-0 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Catechol Intermediate CS-T-10650 120-80-9 In Stock
L-DOPA Methyl Ester Hydrochloride Intermediate CS-T-53966 1421-65-4 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-O-Methyl-L-DOPA 4-Glucuronide Glucuronide CS-T-58158 52583-26-3 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-(3,4-Dimethoxyphenyl)-L-Alanine Fine Chemicals CS-T-19564 32161-30-1 In Stock
Pyruvic Acid Fine Chemicals CS-T-41267 127-17-3 In Stock


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Levodopa Secondary Standards CS-SS-24282-500MG 59-92-7 Enquire
Levodopa Related Compound A Secondary Standards CS-SS-25007-100MG 27244-64-0 Enquire
Levodopa Related Compound B Secondary Standards CS-SS-25008-100MG 7636-26-2 Enquire


Analytical Standard

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Levodopa-d3-AR Grade Analytical Standard CS-O-02700-10MG 53587-29-4 Enquire
Levodopa-d3-AR Grade-10 ppm/ACN Analytical Standard CS-O-02700-1ML 53587-29-4 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Boc-O-ethyl-L-tyrosine Building Blocks CS-M-29734 76757-91-0 Enquire