Dutasteride Impurity 28 CAS CATO-C4X-110328
| CAS No. | CATO-C4X-110328 |
| Molecular Formula | C19H29NO3 |
| Molecular Weight | 319.44 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, Dutasteride Impurity 28 (CAS CATO-C4X-110328, C19H29NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Dutasteride Impurity 28 (C19H29NO3) is characterized by a steroid core, an amide group, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C19H29NO3 |
| Molecular Weight | 319.44 g/mol |
| Appearance | Off-white to pale 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Dutasteride Standards
- Dutasteride impurity A(C4X-16451) (CAS 103335-55-3)
- Dutasteride Impurity 16 (CAS 1430804-94-6)
- Dutasteride Impurity 29 (CAS CATO-C4X-110329)
- Dutasteride Impurity 30 (CAS CATO-C4X-110330)
- Dutasteride EP Impurity A (CAS 104239-97-6)
- Dutasteride Impurity 31 (CAS CATO-C4X-110331)
- Dutasteride Impurity 24 (CAS CATO-C4X-110324)
- Dutasteride EP Impurity B (CAS 2512195-98-9)
Recommended Standards
- Captopril Impurity 39 (CAS CATO-C4X-119039)
- Dapoxetine Impurity 1 (CAS 119357-22-1)
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