Urapidil Impurity 11 CAS 91453-03-1
| CAS No. | 91453-03-1 |
| Molecular Formula | C19H27N5O3 |
| Molecular Weight | 373.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Urapidil Impurity 11 (CAS 91453-03-1, C19H27N5O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Urapidil Impurity 11 (C19H27N5O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures Urapidil Impurity 11 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 | C19H27N5O3 |
| Molecular Weight | 373.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 5 |
Related Urapidil Standards
- Urapidil Impurity 78 (CAS 34667-68-0)
- Urapidil Impurity 79 (CAS 88719-11-3)
- Urapidil Impurity 23 (CAS CATO-C4X-192423)
- Urapidil (CAS 34661-75-1)
- Urapidil Impurity 4 (CAS 34661-79-5)
- Urapidil Impurity 42 (CAS CATO-C4X-192442)
- Urapidil Impurity 58 (CAS CATO-C4X-192458)
- Urapidil Impurity 59 (CAS CATO-C4X-192459)
Recommended Standards
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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