Etrasimod Impurity 33 CAS 131373-89-2
| CAS No. | 131373-89-2 |
| Molecular Formula | C9H12O3 |
| Molecular Weight | 168.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Etrasimod Impurity 33 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.
CATO supplies Etrasimod Impurity 33 (CAS 131373-89-2), a pharmacopoeial impurity reference standard (molecular formula C9H12O3, MW 168.19 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C9H12O3, Etrasimod Impurity 33 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 168.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C9H12O3 |
| Molecular Weight | 168.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
Related Etrasimod Standards
- Etrasimod Impurity 63 (CAS CATO-C4X-321463)
- Etrasimod Impurity 64 (CAS CATO-C4X-321464)
- Etrasimod Impurity 47 (CAS CATO-C4X-321447)
- Etrasimod Impurity 70 (CAS CATO-C4X-321470)
- Etrasimod Impurity 71 (CAS CATO-C4X-321471)
- Etrasimod Impurity 77 (CAS CATO-C4X-321477)
- Etrasimod Impurity 34 (CAS CATO-C4X-321434)
- Etrasimod Impurity 61 (CAS CATO-C4X-321461)
Recommended Standards
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- Niraparib Impurity 17 HCl (CAS CATO-C4X-232917)
- Arbidol Impurity 58 (CAS CATO-C4X-112958)
- Furosemide Impurity 17 (CAS CATO-C4X-140217)
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- [(Cyclopropylmethyl)sulfanyl]methanimidamide hydrobromide (CAS 63667-17-4)
- 2-Cyclopropoxy-5-isopropylaniline (CAS 1243311-80-9)
- (5-Amino-2-chlorophenyl)methanol (CAS 89951-56-4)
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