Eldecalcitol Impurity 3 CAS 861996-34-1
| CAS No. | 861996-34-1 |
| Molecular Formula | C30H50O5 |
| Molecular Weight | 490.72 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Eldecalcitol Impurity 3.
Eldecalcitol Impurity 3 (CAS 861996-34-1) is a certified pharmaceutical impurity reference standard with the molecular formula C30H50O5 and a molecular weight of 490.72 g/mol.
The molecular framework of Eldecalcitol Impurity 3 (C30H50O5) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
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 | C30H50O5 |
| Molecular Weight | 490.72 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >90% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
Related Eldecalcitol Standards
- Eldecalcitol N1 (CAS 2767262-86-0)
- Eldecalcitol (CAS 104121-92-8)
- Eldecalcitol Impurity 2 (CAS 201854-22-0)
- Eldecalcitol Impurity 21 (CAS 1809782-41-9)
- Eldecalcitol Impurity 22 (CAS CATO-C4X-214022)
- Eldecalcitol Impurity 4 (CAS CATO-C4X-21404)
- Eldecalcitol Impurity 5 (CAS CATO-C4X-21405)
- Eldecalcitol Impurity 61 (CAS CATO-C4X-214061)
Recommended Standards
- Eldecalcitol Impurity 64 (CAS CATO-C4X-214064)
- 925932-10-1 C30H50O5 Secaubrytriol W2427 (CAS 925932-10-1)
- Eldecalcitol Impurity 68 (CAS CATO-C4X-214068)
- Cycloastragenol (CAS 78574-94-4)
- Cefazolin EP Impurity E(Cefazolin USP RC E) (CAS 29490-19-5)
- Atogepant Impurity 20 (CAS 1456803-49-8)
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