Impurity reference standards
Parecoxib impurities & reference standards
Characterised Parecoxib impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
18reference materials
COAHPLC · NMR · MS on request
3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonamide
- CAS
- 386273-25-2
- Formula
- C16H14N2O3S
- MW
- 314.4 g/mol
VQ-027393
4-(5-Methyl-4-phenylisoxazol-3-yl)benzenesulfonamide
- CAS
- 181696-12-8
- Formula
- C16H14N2O3S
- MW
- 314.4 g/mol
VQ-027391
4,4'-(Sulfonylbis(4,1-phenylene))bis(5-methyl-3-phenylisoxazole)
- CAS
- 2338845-31-9
- Formula
- C32H24N2O4S
- MW
- 532.6 g/mol
VQ-044893
Ethyl 4-(5-methyl-3-phenylisoxazol-4-yl)benzenesulfonate
- CAS
- 1884279-18-8
- Formula
- C18H17NO4S
- MW
- 343.4 g/mol
VQ-043342
N-((3-(5-Methyl-3-phenylisoxazol-4-yl)phenyl)sulfonyl)propionamide
- CAS
- 1709956-89-7
- Formula
- C19H18N2O4S
- MW
- 370.4 g/mol
VQ-023466
N-((4-(3-Methyl-5-phenylisoxazol-4-yl)phenyl)sulfonyl)propionamide
- CAS
- 477594-28-8
- Formula
- C19H18N2O4S
- MW
- 370.4 g/mol
VQ-041340
N-((4-(5-Methyl-3-(3-(N-propionylsulfamoyl)phenyl)isoxazol-4-yl)phenyl)sulfonyl)propionamide
- CAS
- 1708094-99-8
- Formula
- C22H23N3O7S2
- MW
- 505.6 g/mol
VQ-043343
N-((4-(5-Methyl-4-phenylisoxazol-3-yl)phenyl)sulfonyl)propionamide
- CAS
- 2235371-89-6
- Formula
- C19H18N2O4S
- MW
- 370.4 g/mol
VQ-033068
![N-[[4-(5-Methyl-3-phenyl-4-isoxazolyl)phenyl]sulfonyl]acetamide chemical structure](/media/structures/UMBILIGVYYXBRD-UHFFFAOYSA-N.svg)
N-[[4-(5-Methyl-3-phenyl-4-isoxazolyl)phenyl]sulfonyl]acetamide
- CAS
- 198471-06-6
- Formula
- C18H16N2O4S
- MW
- 356.4 g/mol
VQ-023465
Sodium acetyl(4-(5-methyl-3-phenylisoxazol-4-yl)phenylsulfonyl)amide
- CAS
- 198471-07-7
- Formula
- C18H16N2NaO4S
- MW
- 379.4 g/mol
VQ-041339
FAQs — Parecoxib impurities
Which Parecoxib impurities do you supply?
We list 18 Parecoxib-related reference materials, including process impurities, degradation products and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Parecoxib impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Parecoxib impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Parecoxib impurity standards
We reply within one business day with price, pack options, lead time and documentation.