Indobufen Impurity 40 CAS 203313-55-7
| CAS No. | 203313-55-7 |
| Molecular Formula | C18H19NO4 |
| Molecular Weight | 313.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C18H19NO4, Indobufen Impurity 40 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 313.35 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).
As a process- or degradation-related impurity, Indobufen Impurity 40 (CAS 203313-55-7, C18H19NO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 certified reference material (CRM), Indobufen Impurity 40 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H19NO4 |
| Molecular Weight | 313.35 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2015 |
| Nitrogen Atoms | 1 |
Related Indobufen Standards
- Indobufen Impurity 1 (CAS CATO-C4X-17921)
- Indobufen Impurity 5 (CAS CATO-C4X-17925)
- Indobufen Impurity 41 (CAS CATO-C4X-179241)
- Indobufen Impurity 9 (CAS 76553-18-9)
- Indobufen Impurity 91 (CAS CATO-C4X-179291)
- Indobufen Impurity 43 (CAS CATO-C4X-179243)
- Indobufen impurity 79 (CAS CATO-C4X-179279)
- Indobufen Impurity 10 (CAS 94232-67-4)
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