2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylic acid
- CAS
- 1312815-35-2
- Formula
- C12H9NO4S
- MW
- 263.27 g/mol
ZX-011966
Impurity reference standards
Febuxostat impurity standards
For Febuxostat, the Zemixal catalogue holds 44 impurity and reference standards that support release testing, stability programmes and regulatory dossiers. Counted by type, there are 11 metabolites or hydroxylated analogues.
44reference materials
11metabolites
Each lot ships with a certificate of analysis, and characterisation data such as 1H-NMR, mass spectrum and HPLC purity can be shared before you order. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.
By impurity type
Metabolites11Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Febuxostat reference materials
1–44 of 44 standards
2-[3-[(Hydroxyimino)methyl]-4-(2-methylpropoxy)phenyl]-4-methyl-5-Thiazolecarboxylic Acid Ethyl Ester
- CAS
- 1271738-74-9
- Formula
- C18H22N2O4S
- MW
- 362.4 g/mol
ZX-024705
3-Descyano-3-((hydroxyimino)methyl) Febuxostat
- CAS
- 1350352-70-3
- Formula
- C16H18N2O4S
- MW
- 334.4 g/mol
ZX-029455
4-(2-Methylpropoxy)-1,3-benzenedicarbothioamide
- CAS
- 1330632-46-6
- Formula
- C12H16N2OS2
- MW
- 268.4 g/mol
ZX-024702
Butyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 1619982-02-3
- Formula
- C20H24N2O3S
- MW
- 372.5 g/mol
ZX-029460
Dimethyl 2,2'-(4-isobutoxy-1,3-phenylene)bis(4-methylthiazole-5-carboxylate)
- CAS
- 1330632-47-7
- Formula
- C22H24N2O5S2
- MW
- 460.6 g/mol
ZX-029461
Ethyl 2-(3-(ethoxycarbonyl)-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 1643131-93-4
- Formula
- C20H25NO5S
- MW
- 391.5 g/mol
ZX-029459
Ethyl 2-(3-cyano-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 161798-02-3
- Formula
- C14H12N2O3S
- MW
- 288.32 g/mol
ZX-024699
Ethyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 160844-75-7
- Formula
- C18H20N2O3S
- MW
- 344.4 g/mol
ZX-024696
Ethyl 2-(3-formyl-4-hydroxyphenyl)-4- methylthiazole-5-carboxylate
- CAS
- 161798-01-2
- Formula
- C14H13NO4S
- MW
- 291.32 g/mol
ZX-024689
Ethyl 2-(3-formyl-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 161798-03-4
- Formula
- C18H21NO4S
- MW
- 347.4 g/mol
ZX-024703
Ethyl 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylate
- CAS
- 161797-99-5
- Formula
- C13H13NO3S
- MW
- 263.31 g/mol
ZX-029457
Ethyl 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylate Hydrochloride
- CAS
- 399017-10-8
- Formula
- C13H14ClNO3S
- MW
- 299.77 g/mol
ZX-039167
Questions
Febuxostat impurities, answered
What Febuxostat reference materials are available?
The catalogue currently lists 44 compounds for Febuxostat, including 11 metabolites or hydroxylated analogues. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Febuxostat impurity standard?
A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.
Can Zemixal make a Febuxostat impurity that is not listed?
Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.