etoricoxib and its Impurities
A COX-2 inhibitor, Etoricoxib is used in the treatment of rheumatoid arthritis, psoriatic arthritis, osteoarthritis, spondylitis, chronic low back pain, and gout. It is a selective inhibitor of isoform 2 of the enzyme cyclooxygenase. Reference standards of Etoricoxib API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


Etoricoxib Related Compound C (2-chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate) (1268896)
Etoricoxib Related Compound C (2-chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate) (1268896)
Catalogue No.:PA USP1268896
CAS :
249561-98-6
Molecular Formula : NA
Molecular Weight : NA


1-(6-Methylpyridin-3-yl)-2-((4-(2-(6-methylpyridin-3-yl)-2-oxoethyl)phenyl)sulfonyl)ethan-1-one
1-(6-Methylpyridin-3-yl)-2-((4-(2-(6-methylpyridin-3-yl)-2-oxoethyl)phenyl)sulfonyl)ethan-1-one
Catalogue No.:PA 05 0401003
CAS :
1421227-97-5
Molecular Formula : C22H20N2O4S
Molecular Weight : 408.47


4-Chloro-5-(dimethylamino)-1-(6-methylpyridin-3-yl)-2-(4-(methylsulfonyl)phenyl)penta-2,4-dien-1-one
4-Chloro-5-(dimethylamino)-1-(6-methylpyridin-3-yl)-2-(4-(methylsulfonyl)phenyl)penta-2,4-dien-1-one
Catalogue No.:PA 05 0401009
CAS :
2373365-28-5
Molecular Formula : C20H21ClN2O3S
Molecular Weight : 404.91

![2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)ph PA 05 0401011](https://www.pharmaffiliates.com/pimages/PA050401011.jpg)
2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)phenyl)sulfonyl)-1-(6-methylpyridin-3-yl)ethan-1-one
2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)phenyl)sulfonyl)-1-(6-methylpyridin-3-yl)ethan-1-one
Catalogue No.:PA 05 0401011
CAS :
1817735-82-2
Molecular Formula : C25H20ClN3O3S
Molecular Weight : 477.96

![2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)ph PA 05 0401014](https://www.pharmaffiliates.com/pimages/PA050401014.jpg)
2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)phenyl)sulfonyl)-1-(4-(methylsulfonyl)phenyl)ethan-1-ol
2-((4-(5-Chloro-6'-methyl-[2,3'-bipyridin]-3-yl)phenyl)sulfonyl)-1-(4-(methylsulfonyl)phenyl)ethan-1-ol
Catalogue No.:PA 05 0401014
CAS :
646459-43-0
Molecular Formula : C26H23ClN2O5S2
Molecular Weight : 543.05


2-(5-Chloro-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-6'-yl)-1-(6-(methylsulfonyl)pyridin-3-yl)ethan-1-ol
2-(5-Chloro-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-6'-yl)-1-(6-(methylsulfonyl)pyridin-3-yl)ethan-1-ol
Catalogue No.:PA 05 0401015
CAS :
646459-47-4
Molecular Formula : C25H22ClN3O5S
Molecular Weight : 544.04


2-(5-Chloro-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-6'-yl)-1-(6-methylpyridin-3-yl)ethan-1-ol
2-(5-Chloro-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-6'-yl)-1-(6-methylpyridin-3-yl)ethan-1-ol
Catalogue No.:PA 05 0401016
CAS :
646459-40-7
Molecular Formula : C25H22ClN3O3S
Molecular Weight : 479.98