Rosuvastatin Impurity 266 CAS 775571-58-9
| CAS No. | 775571-58-9 |
| Molecular Formula | C9H15ClO4 |
| Molecular Weight | 222.67 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Rosuvastatin Impurity 266 (CAS 775571-58-9, C9H15ClO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, Rosuvastatin Impurity 266 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 222.67 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 Rosuvastatin Impurity 266 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 | C9H15ClO4 |
| Molecular Weight | 222.67 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
Related Rosuvastatin Standards
- Rosuvastatin Impurity 87 (CAS CATO-C4X-116987)
- Rosuvastatin Impurity 159 (CAS 140164-51-8)
- Rosuvastatin Impurity 239 (CAS CATO-C4X-1169239)
- Rosuvastatin Impurity 59 (CAS 404958-08-3)
- Rosuvastatin Impurity 140 (CAS 154026-92-3)
- Rosuvastatin Impurity 111 (CAS 404958-68-5)
- Rosuvastatin Impurity 137 (CAS 325471-28-1)
- Rosuvastatin Impurity 169 (CAS 404958-69-6)
Recommended Standards
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- 2-((4-Methoxybenzyl)oxy)-5-(2-methylthiazol-4-yl)benzoic acid (CAS 1416347-36-8)
- Insulin Degludec Impurity 26 (CAS CATO-C4X-215726)
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