Impurity reference standards

Firocoxib impurity standards

This page brings together 11 Firocoxib related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 2 metabolites or hydroxylated analogues and 1 degradation product.

11reference materials

2metabolites

1degradants

Parent API

Firocoxib

CAS: 189954-96-9
Formula: C₁₇H₂₀O₅S
MW: 336.4 g/mol
Code: ZX-006555

Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. Laboratories use them to validate related-substance methods, set specification limits under ICH Q3A and Q3B, and identify unknown peaks in stability samples.

By impurity type

Metabolites2Hydroxy, desmethyl and conjugated forms

Degradants1N-oxides, dimers, lactones and breakdown products

Counts are based on product names. One compound can fall into more than one type.

All Firocoxib reference materials

1–11 of 11 standards

2-(Cyclopropylmethoxy)-acetic Acid 1,1-Dimethyl-2-[4-(methylsulfonyl)phenyl]-2-oxoethyl Ester

CAS: 246869-15-8
Formula: C₁₇H₂₂O₆S
MW: 354.4 g/mol

ZX-024755

2-Bromo-2-methyl-1-(4-(methylthio)phenyl)propan-1-one

CAS: 88324-55-4
Formula: C₁₁H₁₃BrOS
MW: 273.19 g/mol

ZX-011996

2-Bromo-2-methyl-1-[4-(methylsulfonyl)phenyl]-1-propanone

CAS: 189955-79-1
Formula: C₁₁H₁₃BrO₃S
MW: 305.19 g/mol

ZX-029522

2-Hydroxy-2-methyl-1-(4-(methylthio)phenyl)propan-1-one

CAS: 71867-98-6
Formula: C₁₁H₁₄O₂S
MW: 210.29 g/mol

ZX-012014

2-Methoxy-3,3-dimethyl-2-(4-methylthiophenyl)oxirane

CAS: 88324-56-5
Formula: C₁₂H₁₆O₂S
MW: 224.32 g/mol

ZX-012017

2-Methyl-1-(4-methylsulfanylphenyl)propan-1-one

CAS: 53207-58-2
Formula: C₁₁H₁₄OS
MW: 194.3 g/mol

ZX-012019

2-Methyl-1-[4-(methylsulfonyl)phenyl]-1-propanone

CAS: 53207-59-3
Formula: C₁₁H₁₄O₃S
MW: 226.29 g/mol

ZX-043910

3-Hydroxy-5,5-dimethyl-4-[4-(methylsulfonyl)phenyl]-2(5H)-furanone

CAS: 189955-89-3
Formula: C₁₃H₁₄O₅S
MW: 282.31 g/mol

ZX-029521

Firocoxib

CAS: 189954-96-9
Formula: C₁₇H₂₀O₅S
MW: 336.4 g/mol

ZX-006555

Firocoxib Ester

Formula: C₁₇H₂₂O₄S
MW: 322.42 g/mol

ZX-012494

Firocoxib Lactone

CAS: 256339-21-6
Formula: C₁₇H₂₀O₃S
MW: 304.41 g/mol

ZX-012495

Questions

Firocoxib impurities, answered

What Firocoxib reference materials are available?

The catalogue currently lists 11 compounds for Firocoxib, including 2 metabolites or hydroxylated analogues and 1 degradation product. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.

What documents come with a Firocoxib 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 Firocoxib 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.