Parecoxib Impurity 2 CAS 181695-72-7
| CAS No. | 181695-72-7 |
| Molecular Formula | C16H14N2O3S |
| Molecular Weight | 314.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Parecoxib Impurity 2 (C16H14N2O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 314.36 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Parecoxib Impurity 2 (CAS 181695-72-7), a pharmacopoeial impurity reference standard (molecular formula C16H14N2O3S, MW 314.36 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.
As a certified reference material (CRM), Parecoxib Impurity 2 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 | C16H14N2O3S |
| Molecular Weight | 314.36 g/mol |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2008 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Parecoxib Standards
- Parecoxib Impurity 15 (CAS 386273-25-2)
- Parecoxib Impurity 3 (CAS CATO-C4X-15913)
- Parecoxib Impurity 32 (CAS 181696-12-8)
- Parecoxib Impurity 47 (CAS 181695-84-1)
- Parecoxib Impurity 51 (CAS 2304623-35-4)
- Parecoxib Impurity 52 (CAS 2304623-37-6)
- Parecoxib Impurity 6 (CAS CATO-C4X-15916)
- Parecoxib sodium Impurity 9 (CAS 1373038-56-2)
Recommended Standards
- Febuxostat Impurity 110 (CAS 1346238-12-7)
- Sildenafil Impurity 77 (CAS CATO-C4X-112877)
- Sildenafil Impurity 69 (CAS CATO-C4X-112869)
- Sildenafil Impurity 299 (CAS CATO-C4X-1128299)
- Rocuronium Impurity 56 (CAS CATO-C4X-124256)
- Febuxostat Impurity 35 (CAS 34133-58-9)
- Desloratadine impurity 66 (CAS CATO-C4X-143066)
- 5-Methyl-3,4-dihydroisoquinolin-1(2H)-one (CAS 129075-56-5)
- Ethyl 1-Boc-3-ethylpiperidine-3-carboxylate (CAS 1178882-02-4)
- 3-Iodo-N-(pyrimidin-5-ylmethyl)aniline (CAS 1340319-03-0)
- 4-Cyclopropyl-5-ethyl-4h-1,2,4-triazole-3-thiol (CAS 886494-06-0)
- (E)-4-Chloro-3-(5-((5-oxo-2-thioxoimidazolidin-4-ylidene)methyl)furan-2-yl)benzoic acid (CAS 6180-25-2)
- Ethyl (S)-2-amino-3-(4-ethoxyphenyl)propanoate hydrochloride (CAS 847449-20-1)
- Pancreatic Polypeptide (1-17)-(Ala31,Aib32)-Neuropeptide Y (18-36) (human) trifluoroacetate salt (CAS 313988-70-4)
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