Prednisolone Impurity 21 CAS CATO-C4X-173721
| CAS No. | CATO-C4X-173721 |
| Molecular Formula | C21H29O8P |
| Molecular Weight | 440.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Prednisolone Impurity 21.
As a process- or degradation-related impurity, Prednisolone Impurity 21 (CAS CATO-C4X-173721, C21H29O8P) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Prednisolone Impurity 21 (C21H29O8P) contains a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.5, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 440.42 g/mol, it falls into the moderately-high-molecular-weight range. 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.
CATO manufactures Prednisolone 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 | 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 23 (CAS CATO-C4X-173723)
- 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)
- Cortisone Phosphate (CAS 508-95-2)
- 2-(-2-((-(2-Hydroxy-5-sulfophenyl)diazenyl)-(phenyl)methylene)hydrazinyl)benzoic acid (CAS 135-52-4)
- 2-((4-Methoxyphenyl)amino)-1-(2-(trifluoromethyl)benzyl)-1H-benzo[d]imidazole-5-carboxamide (CAS 1092829-79-2)
- Abiraterone Impurity N6 (CAS 853-23-6)
- Paliperidone Impurity 47 (CAS 70381-47-4)
- Perindopril EP Impurity E t-Butylamine (CAS CATO-C4X-125268)
- 2-Heptene, 2-methyl- 2-Methyl-2-heptene 627-97-4 NSC-102776 NSC102776 (CAS 627-97-4)
- 2-(Difluoromethyl)-6-iodo-3-methoxypyridin-4-amine (CAS 1805215-73-9)
- (S)-1-(p-tolyl)butan-1-amine (CAS 344794-57-6)
- (4-Fluorophenyl)(3-hydroxypiperidin-1-yl)methanone (CAS 851883-00-6)
- ethyl N-(2-hydroxyethyl)-N-methylcarbamate (CAS 25450-10-6)
- 5-Bromo-3-methyl-N-(tetrahydro-2H-pyran-4-yl)pyridin-2-amine (CAS 1514090-79-9)
- Semaglutide Impurity 165 (CAS CATO-C4X-2226165)
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