Budesonide Impurity 72 CAS CATO-C4X-138972
| CAS No. | CATO-C4X-138972 |
| Molecular Formula | C23H29BrO7 |
| Molecular Weight | 497.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Budesonide Impurity 72 is closely related to a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Budesonide Impurity 72 (CAS CATO-C4X-138972) is a certified pharmaceutical impurity reference standard with the molecular formula C23H29BrO7 and a molecular weight of 497.38 g/mol.
The molecular framework of Budesonide Impurity 72 (C23H29BrO7) 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C23H29BrO7 |
| Molecular Weight | 497.38 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
Related Budesonide Standards
- Budesonide Impurity 40 (CAS 91160-89-3)
- Budesonide Impurity 53 (CAS CATO-C4X-138953)
- Budesonide Impurity 71 (CAS 91160-87-1)
- Budesonide impurity 43 (CAS CATO-C4X-138943)
- Budesonide Impurity 51 (CAS CATO-C4X-138951)
- Budesonide Impurity 62 (CAS CATO-C4X-138962)
- Budesonide Impurity 69 (CAS CATO-C4X-138969)
- Budesonide Impurity 28 (Mixture of Diastereomers) (CAS 2408495-96-3)
Recommended Standards
- (6α,11β,16α)-21-(Acetyloxy)-9-bromo-6-fluoro-11-hydroxy-16-methyl-pregna-1,4-diene-3,20-dione (CAS 54604-73-8)
- AVE-1625 (CAS 358970-97-5)
- 2,4,6-Tribromo-3,5-dimethylphenyl 4-chlorobenzoate (CAS 331461-40-6)
- Methyl 4'-((2-((tert-butoxycarbonyl)amino)ethyl)carbamoyl)-6,6'-bis(chloromethyl)-[2,2'-bipyridine]-4-carboxylate (CAS 1956367-06-8)
- Atropine Impurity 38 (CAS 5226-98-2)
- Pyronaridine Impurity 23 (CAS CATO-C4X-297823)
- Ceftizoxime Impurity 6 (CAS CATO-C4X-17936)
- N-(4-(benzyloxy)benzyl)thietan-3-amine (CAS 2013273-38-4)
- 2-(oxan-2-yl)ethyl methanesulfonate (CAS 133243-83-1)
- 4,4-dimethyl-1-phenylpent-1-en-3-one (CAS 538-44-3)
- 6-Fluoro-7-benzofurancarboxaldehyde (CAS 555155-09-4)
- 1-Iodo-3-(prop-1-en-2-yl)benzene (CAS 865374-43-2)
- 5-Bromo-2-hydroxy-3-methoxybenzonitrile (CAS 198280-95-4)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
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