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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 13CD3 Stable Isotopes CS-O-16502 99614-02-5 (unlabeled) 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-d3 Hydrochloride Salt Stable Isotopes CS-T-83144 1346605-02-4 Enquire
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


API Standards

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


Metabolites

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


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxy-9-methyl Carbazole Impurities CS-O-56555 247096-42-0 Enquire
6,6'-Methylenebis[1,2,3,9-tetrahydro-9-methyl-3-methylene-4H... Impurities CS-T-95905 1365727-09-8 Enquire
Ondansetron Dimer Impurities CS-T-58164 1076198-52-1 In Stock
Ondansetron EP Impurity A Impurities CS-O-11323 153139-56-1 Enquire
Ondansetron EP Impurity A Impurities CS-EO-00049 153139-56-1 In Stock
Ondansetron EP Impurity C Impurities CS-O-31214 27387-31-1 In Stock
Ondansetron EP Impurity G Impurities CS-T-61834 99614-03-6 In Stock
Ondansetron EP Impurity G HCl Impurities CS-O-51805 99614-04-07 Enquire
Ondansetron HCl Imp. C Impurities CS-O-40271 27387-31-1 Enquire
Ondansetron Impurity D Impurities CS-O-31137 99614-64-9 In Stock
Ondansetron N-Desmethyl maleate Impurities CS-O-39816 99614-15-0 Enquire
Ondansetron Nitroso Impurity 1 Impurities CS-EO-02249 Not Available Enquire
Ondansetron Resolution Mixture Impurities CS-O-35452 Not Available Enquire
Ondansetron resolution Mixture RS (Ondansetron HCl and Ondan... Impurities CS-O-57962 Not Available Enquire
Ondansetron USP Related Compound A Impurities CS-O-31138 119812-29-2 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ondansetron for LC system suitability (Y0000197) EP Standards CS-EG-00503 103639-04-9 In Stock
Ondansetron hydrochloride dihydrate EP Standards CS-EG-03278 103639-04-9 In Stock
Ondansetron impurity A (Y0001345) EP Standards CS-EG-00508 103639-04-9 Enquire
Ondansetron impurity E (Y0001326) EP Standards CS-EG-00507 288-32-4 Enquire
Ondansetron impurity F (Y0001320) EP Standards CS-EG-00506 693-98-1 Enquire
Ondansetron impurity G (Y0001346) EP Standards CS-EG-00509 Not Available Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"6-Methyldi(ondansetron-3-de(1,2-dimethyl-1H-imidazole))" Intermediates CS-T-80889 1365727-07-6 Enquire
6-Hydroxy Ondansetron Intermediates CS-T-56359 110708-17-3 Enquire
7-Hydroxy Ondansetron Intermediates CS-T-56360 126702-17-8 Enquire
8-Hydroxy Ondansetron Intermediates CS-T-28369 126671-71-4 Enquire


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