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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ondansetron, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ondansetron 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 Ondansetron-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.

Ondansetron Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
8-Hydroxyondansetron-D3 Stable Isotopes CS-T-103978 126671-71-4 (unlabelled) Enquire
Ondansetron Impurity B-d6 Stable Isotopes CS-T-101120 1076198-52-1 (Unlabelled) Enquire
Ondansetron-d3 Stable Isotopes CS-T-59947 1132757-82-4 In Stock
Ondansetron-d6 Hydrochloride Stable Isotopes CS-O-06836 1225442-22-7 In Stock
Ondesetron-d5 Stable Isotopes CS-CX-00758 1219798-86-3 In Stock
Ondansetron 13CD3 Stable Isotopes CS-O-16502 99614-02-5 (unlabeled) Enquire
Ondansetron-d3 Hydrochloride Salt Stable Isotopes CS-T-83144 1346605-02-4 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ondansetron API CS-O-00286 99614-02-5 In Stock
Ondansetron Hydrochloride API CS-O-04933 99614-01-4 In Stock
Ondansetron Hydrochloride Dihydrate API CS-O-02024 103639-04-9 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Demethyl Ondansetron Metabolite CS-T-15174 99614-14-9 In Stock
1-Methylene Ondansetron Metabolite CS-O-32473 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxy-9-methyl Carbazole Impurity CS-O-56555 247096-42-0 Enquire
6,6'-Methylenebis[1,2,3,9-tetrahydro-9-methyl-3-methylene-4H... Impurity CS-T-95905 1365727-09-8 Enquire
Ondansetron Dimer Impurity CS-T-58164 1076198-52-1 In Stock
Ondansetron EP Impurity A Impurity CS-O-11323 153139-56-1 Enquire
Ondansetron EP Impurity A Impurity CS-EO-00049 153139-56-1 In Stock
Ondansetron EP Impurity C Impurity CS-O-31214 27387-31-1 In Stock
Ondansetron EP Impurity G Impurity CS-T-61834 99614-03-6 In Stock
Ondansetron EP Impurity G HCl Impurity CS-O-51805 99614-04-07 Enquire
Ondansetron hydroxy Impurity Impurity CS-O-52598 Not Available Enquire
Ondansetron Impurity D Impurity CS-O-31137 99614-64-9 In Stock
Ondansetron N-Desmethyl maleate Impurity CS-O-39816 99614-15-0 Enquire
Ondansetron resolution Mixture RS (Ondansetron HCl and Ondan... Impurity CS-O-57962 99614-01-4 + 119812-29-2 Enquire
Ondansetron USP Related Compound A Impurity CS-O-31138 119812-29-2 In Stock
3-(carboxymethyl)-2-methyl-1-((9-methyl-4-oxo-2,3,4,9-tetrah... Impurity CS-O-42138 Not Available Enquire
Ondansetron for system suitability Impurity CS-EG-03354 99614-02-5 Enquire
Ondansetron Resolution Mixture Impurity CS-O-35452 Not Available Enquire
Ondensatron Impurity 2 Impurity CS-EO-01275 154712-79-5 Enquire


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ondansetron hydrochloride dihydrate EP Standards CS-EG-03278 103639-04-9 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Methylimidazole Fine Chemicals CS-T-34062 693-98-1 In Stock
Ondansetron 8 -Sulfate Fine Chemicals CS-ED-01601 126671-73-6 Enquire
Ondansetron 8-Glucoronide Fine Chemicals CS-ED-01602 126671-72-5 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-CYCLOHEXEN-1-ONE, 3-[(2-BROMOPHENYL)AMINO]- Building Blocks CS-ZE-05438 68890-19-7 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Desmethyl N-Nitroso Hexahydroondansetron Nitrosamine CS-O-43797 Not Available Enquire
Ondansetron Nitroso Impurity 1 Nitrosamine CS-EO-02249 Not Available Enquire
Nitroso keto indole Nitrosamine CS-O-41383 Not Available Discontinued
N-Nitroso Ondansetron EP Impurity H Nitrosamine CS-O-52667 Not Available Enquire