Etoricoxib Impurity 31 CAS 2724840-93-9
| CAS No. | 2724840-93-9 |
| Molecular Formula | C18H15ClN2O4S |
| Molecular Weight | 390.84 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Etoricoxib Impurity 31 (CAS 2724840-93-9), a pharmacopoeial impurity reference standard (molecular formula C18H15ClN2O4S, MW 390.84 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H15ClN2O4S, Etoricoxib Impurity 31 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 390.84 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), Etoricoxib Impurity 31 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H15ClN2O4S |
| Molecular Weight | 390.84 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Etoricoxib Standards
- Etoricoxib Impurity 30 (CAS 349536-39-6)
- Etoricoxib Impurity 89 (CAS CATO-C4X-108089)
- Etoricoxib Impurity 93 (CAS CATO-C4X-108093)
- Etoricoxib Impurity 85 (CAS CATO-C4X-108085)
- Etoricoxib Impurity 51 (CAS CATO-C4X-108051)
- Etoricoxib Impurity 10 (CAS 349536-41-0)
- Etoricoxib Impurity 1 (CAS 325855-74-1)
- Etoricoxib Impurity 24 (CAS 325855-71-8)
Recommended Standards
- 5-(5-Chlorothiophen-2-yl)-N'-(3-ethoxy-4-hydroxybenzylidene)-1H-pyrazole-3-carbohydrazide (CAS 303104-90-7)
- 5-chloro-6'-methyl-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridine] 1,1'-dioxide (CAS CATO-C4X-108080)
- 2-[4-(3-Chlorophenyl)piperazin-1-yl]-4-(4-fluorophenyl)-4-oxobutanoic acid (CAS 301194-46-7)
- 2,4,6-Tribromo-3,5-dimethoxyphenol (CAS 121869-55-4)
- Dacomitinib Impurity 30 (CAS CATO-C4X-208630)
- Lapatinib Impurity 42 (CAS CATO-C4X-119142)
- Terbutaline Impurity 79 (CAS CATO-C4X-118379)
- 3-((1-(Methylsulfonyl)pyrrolidin-3-yl)oxy)-4-nitrobenzamide (CAS 917909-64-9)
- Rubrofusarin-6-O-β-D-gentiobioside (CAS 24577-90-0)
- Methyl 4-amino-3-cyclohexylbutanoate (CAS 1479874-31-1)
- N-(9-((2-Hydroxyethoxy)methyl)-9H-purin-6-yl)benzamide (CAS 72710-11-3)
- 1,3-Diphenyl-1H-indazol-5-amine (CAS 857800-70-5)
- N-(1-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5-yl)furan-2-carboxamide (CAS 1226453-85-5)
- CGMP Dependent Kinase Inhibitor Peptide (CAS 82801-73-8)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com