Clascoterone Impurity 1 CAS 39833-17-5
| CAS No. | 39833-17-5 |
| Molecular Formula | C21H28O3 |
| Molecular Weight | 328.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Clascoterone Impurity 1 (C21H28O3) 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 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).
Clascoterone Impurity 1 (CAS 39833-17-5) is a certified pharmaceutical impurity reference standard with the molecular formula C21H28O3 and a molecular weight of 328.45 g/mol.
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), Clascoterone Impurity 1 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 | C21H28O3 |
| Molecular Weight | 328.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
Related Clascoterone Standards
- Clascoterone Impurity 16 (CAS CATO-C4X-333116)
- Clascoterone Impurity 15 (CAS CATO-C4X-333115)
- Clascoterone Impurity 13 (CAS 566-12-1)
- Clascoterone Impurity 12 (CAS 2693-85-8)
- Clascoterone Impurity 3 (CAS CATO-C4X-33313)
- Clascoterone Impurity 6 (CAS CATO-C4X-33316)
- Clascoterone Impurity 4 (CAS CATO-C4X-33314)
- Clascoterone (CAS 19608-29-8)
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- Milnacipran Impurity 16 (CAS 871100-19-5)
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