Indobufen Impurity 44 CAS CATO-C4X-179244
| CAS No. | CATO-C4X-179244 |
| Molecular Formula | C20H21NO5 |
| Molecular Weight | 355.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Indobufen Impurity 44 (C20H21NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO supplies Indobufen Impurity 44 (CAS CATO-C4X-179244), a pharmacopoeial impurity reference standard (molecular formula C20H21NO5, MW 355.38 g/mol) used for the identification and quantification of trace impurities in APIs.
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 44 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 | C20H21NO5 |
| Molecular Weight | 355.38 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Indobufen Standards
- Indobufen Impurity 30 (CAS CATO-C4X-179230)
- Indobufen Impurity 88 (CAS CATO-C4X-179288)
- Indobufen Impurity 57 (CAS CATO-C4X-179257)
- Indobufen Impurity 61 (CAS CATO-C4X-179261)
- Indobufen Impurity 93 (CAS CATO-C4X-179293)
- Indobufen Impurity 66 (CAS CATO-C4X-179266)
- Indobufen Impurity 53 (CAS CATO-C4X-179253)
- Indobufen Impurity 56 (CAS 858847-37-7)
Recommended Standards
- Ketorolac Impurity 37 (CAS CATO-C4X-166937)
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- Papaverine impurity 25 (CAS 33520-96-6)
- Dapoxetine Impurity 31 (CAS 22422-21-5)
- Abiraterone Impurity 7 (CAS CATO-C4X-10707)
- Atenolol Impurity 21 (CAS CATO-C4X-154921)
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