Prednisolone Impurity 33 CAS CATO-C4X-173733
| CAS No. | CATO-C4X-173733 |
| Molecular Formula | C23H27BrO7 |
| Molecular Weight | 495.36 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 33.
Prednisolone Impurity 33 (CAS CATO-C4X-173733) is a certified pharmaceutical impurity reference standard with the molecular formula C23H27BrO7 and a molecular weight of 495.36 g/mol.
The molecular framework of Prednisolone Impurity 33 (C23H27BrO7) is characterized by a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution. 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).
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 33 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 | C23H27BrO7 |
| Molecular Weight | 495.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
Related Prednisolone Standards
- Prednisolone Impurity 35 (CAS CATO-C4X-173735)
- Prednisolone 21-Acetate 17-Valerate (CAS 72064-79-0)
- Prednisolone Impurity 51 (CAS 1428883-48-0)
- Prednisolone Impurity 42 (CAS 85847-53-6)
- Prednisolone Impurity 44 (CAS 4224-31-1)
- Prednisolone 17-(Ethyl Carbonate) 21-Acetate (CAS 671225-23-3)
- Prednisolone Impurity 17 (CAS CATO-C4X-173717)
- Prednisolone 11,21-Diacetate-17-Valerate (CAS 80447-56-9)
Recommended Standards
- Budesonide Impurity 69 (CAS CATO-C4X-138969)
- Budesonide Impurity 62 (CAS CATO-C4X-138962)
- Empagliflozin Impurity N31 (CAS 2452301-12-9)
- Budesonide Impurity 51 (CAS CATO-C4X-138951)
- Cefoxitin EP Impurity I (CAS CATO-C4X-157813)
- Trazodone impurity 41 (CAS CATO-C4X-177241)
- Remdesivir Impurity 4 (CAS 55094-52-5)
- 2-[2-(4-Phenylmethoxyphenoxy)ethoxy]ethanol (CAS 142879-00-3)
- Cyclohexyl(4-(dimethylamino)phenyl)methanone (CAS 4664-70-4)
- N-methyl-1-(5-(pyridin-3-yl)-1H-pyrazol-4-yl)methanamine (CAS 1157239-12-7)
- 1-(tert-Butyldimethylsilyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole (CAS 1111096-51-5)
- 2-[2-(Dimethylamino)phenyl]acetonitrile (CAS 1000512-16-2)
- 2-(1-(Piperidin-3-ylmethyl)-1H-1,2,3-triazol-4-yl)ethan-1-ol hydrochloride (CAS 1779125-24-4)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
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