Dydrogesterone Impurity 19 CAS 74496-89-2
| CAS No. | 74496-89-2 |
| Molecular Formula | C25H37BrO4 |
| Molecular Weight | 481.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Dydrogesterone Impurity 19 (CAS 74496-89-2), a pharmacopoeial impurity reference standard (molecular formula C25H37BrO4, MW 481.46 g/mol) used for the identification and quantification of trace impurities in APIs.
Dydrogesterone Impurity 19 (C25H37BrO4) contains a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, 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).
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.
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 | 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 20 (CAS 74496-90-5)
- 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)
Recommended Standards
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- 2-(2,5-Dimethylphenyl)-6,8-dimethylquinoline-4-carboxylic acid (CAS 438228-75-2)
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Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com