Dydrogesterone Impurity 21 CAS CATO-C4X-218321
| CAS No. | CATO-C4X-218321 |
| Molecular Formula | C25H34O4 |
| Molecular Weight | 398.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Dydrogesterone Impurity 21 (CAS CATO-C4X-218321, C25H34O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Dydrogesterone Impurity 21 (C25H34O4) contains a flavonoid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
CATO manufactures Dydrogesterone Impurity 21 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C25H34O4 |
| Molecular Weight | 398.54 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Dydrogesterone Standards
- Dydrogesterone Impurity 24 (CAS CATO-C4X-218324)
- Dydrogesterone Impurity 11 (CAS CATO-C4X-218311)
- Dydrogesterone Impurity 15 (CAS 32164-74-2)
- Dydrogesterone Impurity 16 (CAS 151478-10-3)
- Dydrogesterone Impurity 5 (CAS 5488-51-7)
- Dydrogesterone Impurity 7 (CAS 19592-55-3)
- Dydrogesterone Impurity 9 (CAS 99958-08-4)
- Dydrogesterone Impurity 17 (CAS 71379-22-1)
Recommended Standards
- Urapidil Impurity 47 (CAS CATO-C4X-192447)
- Megestrol acetate EP Impurity H (CAS 907193-65-1)
- Ribociclib Impurity 13 (CAS 158328-38-2)
- Megestrol acetate EP Impurity G (CAS 1259198-59-8)
- Azasetron Impurity 5 (CAS CATO-C4X-28685)
- Etoricoxib Impurity 24 (CAS 325855-71-8)
- Bisacodyl Impurity 16 (CAS CATO-C4X-203716)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com