Budesonide impurity 45 CAS 3517-49-5
| CAS No. | 3517-49-5 |
| Molecular Formula | C25H32O7 |
| Molecular Weight | 444.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Budesonide impurity 45 (CAS 3517-49-5), a pharmacopoeial impurity reference standard (molecular formula C25H32O7, MW 444.52 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Budesonide impurity 45 (C25H32O7) is characterized by a flavonoid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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 manufactures Budesonide impurity 45 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 | C25H32O7 |
| Molecular Weight | 444.52 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Budesonide Standards
- Budesonide 17,21-Diacetyloxy Impurity (CAS 17652-24-3)
- Budesonide Impurity 22(Mixture of Diastereomers) (CAS CATO-C4X-138922)
- Budesonide Impurity 76 (CAS CATO-C4X-138976)
- Budesonide EP Impurity I (CAS 113930-13-5)
- Budesonide Impurity 37 (CAS 95943-95-6)
- Budesonide-d8 (Mixture of Diastereomers) (CAS 1105542-94-6)
- Budesonide d6 (CAS 1134189-63-1)
- Budesonide Impurity 66 (CAS CATO-C4X-138966)
Recommended Standards
- Hydrocortisone Impurity 72 (CAS CATO-C4X-140172)
- Canagliflozin Impurity 86 (CAS CATO-C4X-112386)
- Prednisolone Acetate EP Impurity C (CAS 98523-85-4)
- Canagliflozin Impurity 78 (CAS 842133-17-9)
- Imidafenacin Impurity 4 (CAS CATO-C4X-18084)
- Urapidil Impurity 29 (CAS 21103-25-3)
- Progesterone Impurity 35 (CAS 88128-62-5)
- 2-(((2-Aminophenyl)amino)methylene)-5,5-dimethylcyclohexane-1,3-dione (CAS 33620-76-7)
- 1-(2,6-Diisopropylphenyl)-2-phenyl-1H-imidazole (CAS 914306-50-6)
- 3-(Triethoxysilyl)pyridine (CAS 129663-08-7)
- 1-Chloro-2,4-dibromo-3-fluorobenzene (CAS 1521476-92-5)
- 4-Chloro-N-(2,5-dimethylphenyl)benzenesulfonamide (CAS 7454-68-4)
- 3-Bromo-5-(chloromethyl)-1,2,4-oxadiazole (CAS 121562-12-7)
- Semaglutide Impurity 115 (CAS CATO-C4X-2226115)
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