Eldecalcitol Impurity 32 CAS 2106839-39-6
| CAS No. | 2106839-39-6 |
| Molecular Formula | C18H26O2 |
| Molecular Weight | 274.40 g/mol |
| 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.
As a process- or degradation-related impurity, Eldecalcitol Impurity 32 (CAS 2106839-39-6, C18H26O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Eldecalcitol Impurity 32 (C18H26O2) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C18H26O2 |
| Molecular Weight | 274.40 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1997 |
Related Eldecalcitol Standards
- Eldecalcitol Impurity 6 (CAS 70550-73-1)
- Eldecalcitol Impurity 51 (CAS 1527523-12-1)
- Eldecalcitol Impurity 54 (CAS 100928-07-2)
- Eldecalcitol Impurity 41 (CAS 214351-92-5)
- Eldecalcitol Impurity 19 (CAS 75197-02-3)
- Eldecalcitol Impurity 44 (CAS CATO-C4X-214044)
- Eldecalcitol Impurity 56 (CAS 66774-82-1)
- Eldecalcitol Impurity 60 (CAS 66251-18-1)
Recommended Standards
- Ropivacaine Impurity 34 (CAS 175888-75-2)
- Perospirone impurity 49 (CAS CATO-C4X-245849)
- Ropivacaine EP Impurity G ((R)-Ropivacaine) (CAS 98717-16-9)
- Dotinurad Impurity 29 (CAS CATO-C4X-249429)
- Estriol EP Impurity A (CAS 246021-20-5)
- Midecamycin Impurity 26 (CAS CATO-C4X-312226)
- Methylprednisolone Acetate EP Impurity F (CAS CATO-C4X-19198)
- Ethyl 3-(diisopropylamino)-3-oxopropanoate (CAS 52053-72-2)
- Ampicillin Impurity S (CAS CATO-C4X-144332)
- N-nitroso-propafenone impurity B (CAS CATO-C4X-132237)
- Rapamycin Impurity 31 (CAS CATO-C4X-174631)
- (2Z)-2-[(4-Methylphenyl)methylidene]-2,3,4,9-tetrahydro-1H-carbazol-1-one (CAS 1164469-52-6)
- [4-(hydroxymethyl)-2-oxabicyclo[2.1.1]hexan-1-yl]methylacetate (CAS 2170372-27-5)
- Insulin Degludec Impurity 18 (CAS CATO-C4X-215718)
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