Bifonazole impurity 20 CAS 790661-19-7
| CAS No. | 790661-19-7 |
| Molecular Formula | C23H20N2 |
| Molecular Weight | 324.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C23H20N2, Bifonazole impurity 20 contains a nitrogen-containing heterocyclic scaffold, a nitrile group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 324.42 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, Bifonazole impurity 20 (CAS 790661-19-7, C23H20N2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), Bifonazole impurity 20 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 | C23H20N2 |
| Molecular Weight | 324.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 2 |
Related Bifonazole Standards
- Bifonazole impurity 19 (CAS CATO-C4X-156019)
- Bifonazole impurity 21 (CAS CATO-C4X-156021)
- Bifonazole impurity 18 (CAS CATO-C4X-156018)
- Bifonazole-D5 (CAS CATO-C4X-156024)
- Bifonazole Impurity 15 (CAS CATO-C4X-156015)
- Bifonazole EP Impurity B (CAS 91679-37-7)
- Bifonazole (CAS 60628-96-8)
- Bifonazole Impurity 22 (CAS CATO-C4X-156022)
Recommended Standards
- Acotiamide Impurity 3 (CAS 1824734-16-8)
- Pazopanib Impurity 33 (CAS CATO-C4X-172533)
- Citalopram Impurity 17 (CAS 1187671-15-3)
- Vinpocetine Impurity 23 (CAS CATO-C4X-184323)
- Roflumilast Impurity 52 (CAS CATO-C4X-108452)
- Ceftolozane Impurity 21 (CAS CATO-C4X-240621)
- Atrasentan Impurity 73 (CAS 1058404-70-8)
- N1,N1,N4,N4-Tetra(pyridin-4-yl)benzene-1,4-diamine (CAS 1218812-56-6)
- Azido-PEG1-PFP ester (CAS 1807505-32-3)
- Meldonium impurity B CRS (CAS 34810-18-9)
- Phthalic acid, bis-isopentyl ester D4 (CAS 1346597-80-5)
- 4-Bromo-2-(3,3-difluoropiperidin-1-yl)pyridine (CAS 1779120-61-4)
- All Cis-5,8,11,14,17-Eicosapentaenoic Acid Ethyl Ester (contains 2000ppm alpha-tocopherol as stabilizer) (CAS 86227-47-6)
- Steroidogenesis-Activator Polypeptide (rat) (H-8855.0500) (CAS 108563-23-1)
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