Oclacitinib Impurity 16 CAS 2124221-18-5
| CAS No. | 2124221-18-5 |
| Molecular Formula | C21H25N4O5S2 |
| Molecular Weight | N/A |
| 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 Oclacitinib Impurity 16 (CAS 2124221-18-5), a pharmacopoeial impurity reference standard (molecular formula C21H25N4O5S2Na, MW 500.56 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Oclacitinib Impurity 16 (C21H25N4O5S2Na) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.5, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 500.56 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).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C21H25N4O5S2 Na |
| Molecular Weight | 500.56 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 2 |
Related Oclacitinib Standards
- Oclacitinib (CAS 1208319-26-9)
- Oclacitinib Maleate (CAS 1208319-27-0)
- Oclacitinib Impurity 21 (CAS 1208319-28-1)
- Oclacitinib Impurity 18 (CAS 1208319-32-7)
- Oclacitinib Impurity 44 (CAS 1208319-33-8)
- Oclacitinib Impurity 22 (CAS 1208319-34-9)
- Oclacitinib Impurity 20 (CAS 1312034-36-8)
- Oclacitinib Impurity 25 (CAS 1480743-81-4)
Recommended Standards
- Ticagrelor impurity 104 (CAS CATO-C4X-1093104)
- Apixaban Impurity 13 (CAS CATO-C4X-108813)
- Bupropion Impurity 31 (CAS CATO-C4X-120331)
- (S)-2-Morpholinopropan-1-ol (CAS 1352306-49-0)
- (S)-Baxdrostat Impurity 24 (CAS 1428652-34-9)
- 2,2,6,6-Tetramethyl-1-(prop-2-yn-1-yl)piperidine (CAS 25665-47-8)
- (2e)-3-(4-Chlorobenzenesulfonyl)prop-2-enenitrile (CAS 64326-48-3)
- 7-Isopropyl-1,2,3,4-tetrahydroquinoline (CAS 746560-21-4)
- 5-(2-Bromoallyl)-1,2-difluoro-3-methoxybenzene (CAS 1379310-91-4)
- Semaglutide impurity 289 (CAS CATO-C4X-2226289)
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