Remdesivir Impurity 4 CAS 55094-52-5
| CAS No. | 55094-52-5 |
| Molecular Formula | C26H26O5 |
| Molecular Weight | 418.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Remdesivir Impurity 4 is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Remdesivir Impurity 4 (CAS 55094-52-5), a pharmacopoeial impurity reference standard (molecular formula C26H26O5, MW 418.48 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Remdesivir Impurity 4 (C26H26O5) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 418.48 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).
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.
As a certified reference material (CRM), Remdesivir Impurity 4 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 | C26H26O5 |
| Molecular Weight | 418.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
Related Remdesivir Standards
- Remdesivir Impurity 24 (CAS 54623-25-5)
- Remdesivir Impurity 60 (CAS 38873-96-0)
- Remdesivir Impurity 46 (CAS CATO-C4X-210046)
- Remdesivir Impurity 13 (CAS 141607-35-4)
- Remdesivir Impurity 25 (CAS 1256490-31-9)
- Remdesivir Impurity 36 (CAS CATO-C4X-210036)
- Remdesivir Impurity 14 (CAS CATO-C4X-210014)
- Remdesivir Impurity 32 (CAS CATO-C4X-210032)
Recommended Standards
- Dexrazoxane Impurity 35 (CAS CATO-C4X-202035)
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Why CATO?
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