Budesonide Impurity 18 CAS CATO-C4X-138918
| CAS No. | CATO-C4X-138918 |
| Molecular Formula | C21H26O5 |
| Molecular Weight | 358.43 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 Budesonide Impurity 18.
As a process- or degradation-related impurity, Budesonide Impurity 18 (CAS CATO-C4X-138918, C21H26O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C21H26O5, Budesonide Impurity 18 contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 358.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 18 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 | C21H26O5 |
| Molecular Weight | 358.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Budesonide Standards
- Budesonide Impurity 15 (CAS CATO-C4X-138915)
- Budesonide Impurity 20 (CAS CATO-C4X-138920)
- Budesonide Impurity 26 (CAS 77017-17-5)
- Budesonide Impurity 47 (CAS CATO-C4X-138947)
- Budesonide Impurity 74 (CAS CATO-C4X-138974)
- Budesonide Impurity N2 (CAS 39672-76-9)
- Budesonide Impurity 58 (CAS CATO-C4X-138958)
- Budesonide Impurity 64 (CAS 69155-84-6)
Recommended Standards
- Enalapril EP Impurity D (CAS 115729-52-7)
- R-Enalapril Diketopiperazine (CAS CATO-C4X-133427)
- Salbutamol Impurity 188 (CAS CATO-C4X-1176188)
- Sildenafil Impurity 275 (CAS CATO-C4X-1128275)
- Propranolol Impurity 23 (CAS 77252-87-0)
- Raltegravir N-Formyl Impurity (CAS CATO-C4X-261510)
- Cabergoline Impurity 8 (CAS CATO-C4X-27748)
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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