Phenytoin Impurity 19 CAS CATO-C4X-186419
| CAS No. | CATO-C4X-186419 |
| Molecular Formula | C17H14I2N2O2 |
| Molecular Weight | 532.11 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Phenytoin Impurity 19 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.
Phenytoin Impurity 19 (CAS CATO-C4X-186419) is a certified pharmaceutical impurity reference standard with the molecular formula C17H14I2N2O2 and a molecular weight of 532.11 g/mol.
Based on its molecular formula C17H14I2N2O2, Phenytoin Impurity 19 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, iodine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 532.11 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C17H14I2N2O2 |
| Molecular Weight | 532.11 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
Related Phenytoin Standards
- Phenytoin Impurity 24 (CAS CATO-C4X-186424)
- Phenytoin impurity 20 (CAS CATO-C4X-186420)
- Phenytoin Impurity 18 (CAS CATO-C4X-186418)
- Phenytoin Impurity 17 (CAS CATO-C4X-186417)
- Phenytoin Impurity 16 (CAS CATO-C4X-186416)
- Phenytoin Impurity 2 (CAS 36898-62-1)
- Phenytoin EP Impurity D (CAS 5157-15-3)
- Phenytoin Impurity 21 (CAS CATO-C4X-186421)
Recommended Standards
- (4-Hydroxy-3,5-diiodophenyl)(2-isopropylbenzofuran-3-yl)methanone (CAS 94330-71-9)
- 1H,1H,11H-Eicosafluoro-1-undecanol (CAS 307-70-0)
- 5-(4-((3-Chlorobenzyl)amino)-2-(4-(2-(dimethylamino)ethyl)piperazin-1-yl)quinazolin-6-yl)-1-methylpyridin-2(1H)-one (CAS 2098711-72-7)
- LPU25F15UQ 603148-36-3 Azeliragon [INN] Azeliragon [USAN] UNII-LPU25F15UQ 1-Propanamine, 3-(4-(2-butyl-1-(4-(4-chlorophenoxy)phenyl)-1H-imidazol-4-yl)phenoxy)-N,N-diethyl- Azeliragon TTP488 PF-04494700 Azeliragon [USAN:INN] (CAS 603148-36-3)
- Dotinurad Impurity 94 (CAS CATO-C4X-249494)
- Roxadustat Impurity 11 HCl (CAS CATO-C4X-221311)
- Entecavir Impurity 75 (CAS 701278-13-9)
- 2-Oxa-8-azaspiro[4.5]decan-4-one (CAS 2227205-76-5)
- Methyl (R,E)-3-(dimethyl(phenyl)silyl)hex-4-enoate (CAS 136174-52-2)
- 2-Ethoxy-4-formylphenyl 4-methylbenzenesulfonate (CAS 443662-76-8)
- Ethyl 5-bromo-2-((tert-butoxycarbonyl)amino)-4-methylbenzoate (CAS 1478194-46-5)
- N-(3-Aminophenyl)-2-[2-(sec-butyl)phenoxy]-acetamide (CAS 953727-25-8)
- 2-(3-(Difluoromethyl)-4-methoxybenzoyl)pyridine (CAS 1261870-01-2)
- D-[Ser]8-Semaglutide (CAS CATO-CPTD788632)
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