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

Febuxostat Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Descyano 3-Bromo-febuxostat D9 Stable Isotopes CS-T-62864 144060-40-2 (Unlabeled) Enquire
3-Descyano Febuxostat D9 Stable Isotopes CS-EO-02528 Not Available Enquire
3-Descyano Febuxostat D9 Ethyl Ester Stable Isotopes CS-T-62867 144060-97-9 (Unlabeled) Enquire
Descarboxyl Febuxostat-d9 Stable Isotopes CS-T-101582 Not Available Enquire
Febuxostat D3 Stable Isotopes CS-O-44145 Not Available Enquire
Febuxostat D5 Stable Isotopes CS-O-44147 Not Available Enquire
Febuxostat-d7 Stable Isotopes CS-P-02585 1285539-74-3 In Stock
Febuxostat-d9 Stable Isotopes CS-O-06611 1246819-50-0 In Stock


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Febuxostat API Standards CS-O-11648 144060-53-7 In Stock
Febuxostat Hemihydrate API Standards CS-EO-03552 442664-09-7 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Febuxostat Metabolite 67M-1 Metabolites CS-P-02583 887945-96-2 In Stock
Febuxostat metabolite 67M-2 Metabolites CS-P-02584 407582-47-2 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(Z)-hydroxyimino des-isobutyl Febuxostat impurity Impurities CS-O-53983 Not Available Enquire
3-Descyano 3-Bromo-febuxostat Impurities CS-O-46320 144060-40-2 Enquire
3-Descyano Febuxostat Impurities CS-T-62865 1206550-99-3 In Stock
3-Descyano Febuxostat Ethyl Ester Impurities CS-T-62866 144060-97-9 In Stock
3-Descyano-3-ethoxycarbonyl Febuxostat Impurities CS-P-08603 2476465-11-7 In Stock
3-Descyano-3-formyl Febuxostat Isobutyl Ester Impurities CS-T-73945 1312815-36-3 Enquire
4-Nitrophthalonitrile Impurities CS-M-56658 31643-49-9 In Stock
Bromo Febuxostat Impurities CS-O-14914 Enquire
Descyano Hydroxy Febuxostat Impurities CS-O-14915 886501-78-6 Enquire
Desisobutyl Formyl Febuxostat Impurities CS-O-44196 1312815-35-2 Enquire
Ethyl 2-(3-formyl-2-hydroxyphenyl)-4-methylthiazole-5-carbox... Impurities CS-O-47911 Not Available Enquire
Ethyl 2-(3-formyl-4-hydroxyphenyl)-4- methylthiazole-5-carbo... Impurities CS-O-31550 161798-01-2 In Stock
Ethyl 2,2-dichloro-3-oxobutanoate Impurities CS-O-40974 6134-66-3 Enquire
Febuxostat 2-butanol Isomer Impurities CS-O-14983 1335202-59-9 In Stock
Febuxostat 2-Butyl Isomer Ethyl Ester Impurities CS-T-95877 2375033-35-3 Enquire
Febuxostat 67M-4 Impurities CS-T-62868 407582-49-4 In Stock
FEBUXOSTAT DEE IMPURITY Impurities CS-O-33959 1643131-93-4 In Stock
Febuxostat ethylester 4- n-propoxyphenyl impurity Impurities CS-O-44044 2985809-19-4 Enquire
Febuxostat ethylester 4-ethoxyphenyl impurity Impurities CS-O-57546 Not Available Enquire
Febuxostat ethylester 4-Isopropoxyphenyl impurity Impurities CS-O-57547 144060-84-4 Enquire
Febuxostat ethylester Amide impurity Impurities CS-O-57545 1346238-15-0 Enquire
Febuxostat Impurity 10 Impurities CS-P-02571 Not Available Enquire
Febuxostat Impurity 12 Impurities CS-P-02572 Not Available Enquire
Febuxostat Impurity 13 Impurities CS-P-02573 Not Available Enquire
Febuxostat Impurity 14 Impurities CS-P-02574 1335202-60-2 Enquire
Febuxostat Impurity 15 Impurities CS-P-02575 Not Available Enquire
Febuxostat Impurity 16 Impurities CS-P-02576 Not Available Enquire
Febuxostat Impurity 18 Impurities CS-P-02578 Not Available Enquire
Febuxostat Impurity 19 Impurities CS-P-02579 118485-48-6 Enquire
Febuxostat Impurity 2 Impurities CS-O-31551 161798-03-4 Enquire
Febuxostat Impurity 20 Impurities CS-P-02580 Not Available Enquire
Febuxostat Impurity 21 Impurities CS-P-02581 Not Available Enquire
Febuxostat Impurity 22 Impurities CS-P-02582 Not Available Enquire
Febuxostat Impurity 23 Impurities CS-O-45292 2476465-06-0 Enquire
Febuxostat Impurity 28 Impurities CS-P-02569 1350352-70-3 In Stock
Febuxostat Impurity 30 Impurities CS-O-36189 2073891-59-3 Enquire
Febuxostat Impurity 32 Impurities CS-O-57540 1267681-15-1 Enquire
Febuxostat Impurity 39 Impurities CS-EO-02986 2646683-37-4 Enquire
Febuxostat Impurity 5 Impurities CS-T-51361 161798-02-3 In Stock
Febuxostat Impurity 6 Impurities CS-P-02568 1271738-74-9 In Stock
Febuxostat Impurity 8 Impurities CS-P-02570 144060-62-8 Enquire
Febuxostat Impurity C Impurities CS-T-50354 1239233-87-4 In Stock
Febuxostat Isobutyl Ester Impurity Impurities CS-T-95853 Not Available Enquire
Febuxostat ISOMER 2 Impurities CS-O-44042 Not Available Enquire
Febuxostat ISOMER 3 Impurities CS-O-44043 Not Available Enquire
Febuxostat Isopropyl Ester Impurities CS-T-62869 1346238-10-5 In Stock
Febuxostat Isopropyl isomer Impurities CS-O-14984 144060-52-6 Enquire
Febuxostat Methyl Ester Impurities CS-TB-92189 923942-34-1 In Stock
Febuxostat t-Butyl Ether Acid Impurity Impurities CS-EO-02199 2418591-43-0 Enquire
Hydroxy Febuxostat Impurities CS-O-14920 407582-48-3 In Stock
Hydroxy Febuxostat descyano Acid impurity Impurities CS-O-57544 Not Available Enquire
Hydroxy Febuxostat ethyl ester Descyano Amide impurity Impurities CS-O-57542 Not Available Enquire
Hydroxy Febuxostat ethylester Amide impurity Impurities CS-O-57543 Not Available Enquire
Hydroxy Febuxostat phosphonic acid impurity Impurities CS-O-57541 Not Available Enquire
O-Desisobutyl O-n-Butyl Febuxostat Impurities CS-O-14982 1657014-33-9 In Stock
O-Desisobutyl O-n-Butyl Febuxostat Ethyl Ester Impurities CS-O-45587 2230270-05-8 In Stock
O-Desisobutyl O-propyl Febuxostat Impurities CS-P-02577 1530308-87-2 In Stock


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Febuxostat Ethyl Ester Intermediates CS-O-31552 160844-75-7 In Stock


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Febuxostat acyl-beta-D-Glucuronide Glucuronides CS-O-05714 1351692-92-6 In Stock