Prednisolone Impurity 23 CAS CATO-C4X-173723
| CAS No. | CATO-C4X-173723 |
| Molecular Formula | C21H29O8P |
| Molecular Weight | 440.42 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, Prednisolone Impurity 23 (CAS CATO-C4X-173723, C21H29O8P) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Prednisolone Impurity 23 (C21H29O8P) contains a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Prednisolone Impurity 23 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 | C21H29O8P |
| Molecular Weight | 440.42 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Prednisolone Standards
- Prednisolone Phosphate - API Standards (CAS 302-25-0)
- Prednisolone Impurity 20 (CAS CATO-C4X-173720)
- Prednisolone Impurity 21 (CAS CATO-C4X-173721)
- Prednisolone Impurity 24 (CAS CATO-C4X-173724)
- Prednisolone impurity 56 (CAS CATO-C4X-173756)
- Prednisolone 21-Methanesulfonate (CAS 35410-28-7)
- Prednisolone EP Impurity A Hydrochloride (CAS 393782-60-0)
- Prednisolone Impurity 31 (CAS 6677-19-6)
Recommended Standards
- Prednisone Impurity 8 (CAS CATO-C4X-16948)
- 2-(-2-((-(2-Hydroxy-5-sulfophenyl)diazenyl)-(phenyl)methylene)hydrazinyl)benzoic acid (CAS 135-52-4)
- (S)-2-(7-Nitrodibenzo[b,d]furan-2-sulfonamido)-3-phenylpropanoic acid (CAS 98044-79-2)
- Cortisone Phosphate (CAS 508-95-2)
- Crizotinib impurity 19 (CAS CATO-C4X-102519)
- Bicalutamide Impurity 34 (CAS CATO-C4X-101334)
- Terbutaline impurity 85 (CAS CATO-C4X-118385)
- 2-{[2-(4-chlorophenoxy)ethoxy]methyl}oxirane (CAS 540760-62-1)
- 2-Isopropylimidazo[1,2-a]pyrimidine-3-carbaldehyde (CAS 89021-16-9)
- 2,5-Dichloro-3-(difluoromethoxy)phenylacetic acid 1803806-63-4 (CAS 1803806-63-4)
- Methyl 5-bromo-2-(4-chlorophenyl)-1-ethyl-6-methyl-4-oxo-1,4-dihydro-3-pyridinecarboxylate (CAS 866154-96-3)
- Z-Ser(Tos)-OMe (CAS 1492-52-0)
- (-)-Phaseic Acid (CAS 24394-14-7)
- Semaglutide Impurity 180 (CAS CATO-C4X-2226180)
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