Dydrogesterone Impurity 20 CAS 74496-90-5
| CAS No. | 74496-90-5 |
| Molecular Formula | C25H37BrO4 |
| Molecular Weight | 481.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Dydrogesterone Impurity 20 (CAS 74496-90-5), a pharmacopoeial impurity reference standard (molecular formula C25H37BrO4, MW 481.46 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Dydrogesterone Impurity 20 (C25H37BrO4) is characterized by a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution. 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO manufactures Dydrogesterone Impurity 20 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 | C25H37BrO4 |
| Molecular Weight | 481.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Br-containing |
Related Dydrogesterone Standards
- Dydrogesterone Impurity 19 (CAS 74496-89-2)
- Dydrogesterone Impurity 17 (CAS 71379-22-1)
- 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)
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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