Etoricoxib Impurity 4 CAS 4052-30-6
| CAS No. | 4052-30-6 |
| Molecular Formula | C8H8O4S |
| Molecular Weight | 200.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Etoricoxib Impurity 4 (C8H8O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies Etoricoxib Impurity 4 (CAS 4052-30-6), a pharmacopoeial impurity reference standard (molecular formula C8H8O4S, MW 200.21 g/mol) used for the identification and quantification of trace impurities in APIs.
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 manufactures Etoricoxib Impurity 4 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H8O4S |
| Molecular Weight | 200.21 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Etoricoxib Standards
- Etoricoxib Impurity 37 (CAS 118362-28-0)
- Etoricoxib Impurity 3 (CAS 10297-73-1)
- Etoricoxib Impurity 31 (CAS 93629-02-8)
- Etoricoxib Impurity 73 (CAS 1937252-96-4)
- EtoricoxiB impurity 16 (CAS 90536-66-6)
- Etoricoxib Impurity 36 (CAS 33963-58-5)
- Etoricoxib Impurity 87 (CAS 26524-93-6)
- Etoricoxib Impurity 3 (CAS 90584-68-2)
Recommended Standards
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- Orforglipron Impurity 18 (CAS CATO-C4X-323418)
- Dexmedetomidine Impurity N1 (CAS 33016-47-6)
- (4-Butylphenyl)(furan-2-yl)methanone (CAS 73399-37-8)
- SB 271046 (CAS 209481-20-9)
- 4-Chloro-N-(2-((4-chlorophenyl)thio)ethyl)benzamide (CAS 339100-05-9)
- 2-Methoxy-6-methylbenzonitrile (CAS 53005-44-0)
- (4-Chloro-3-(methylcarbamoyl)phenyl)boronic acid (CAS 871332-65-9)
- N-(2,3-Dimethylphenyl)-3-oxobutanamide (CAS 55909-76-7)
- Insulin Degludec Impurity 20 (CAS CATO-C4X-215720)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com