Terbinafine impurity 42 CAS CATO-C4X-133842
| CAS No. | CATO-C4X-133842 |
| Molecular Formula | C17H17Cl2N |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Terbinafine impurity 42 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.
CATO supplies Terbinafine impurity 42 (CAS CATO-C4X-133842), a pharmacopoeial impurity reference standard (molecular formula C17H17Cl2NHCl, MW 342.69 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C17H17Cl2NHCl, Terbinafine impurity 42 contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 342.69 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 | C17H17Cl2N HCl |
| Molecular Weight | 342.69 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Terbinafine Standards
- Terbinafine Hydroxy Benzoate (CAS 1076198-30-5)
- Terbinafine Carboxylic Acid Methyl Ester (Oxalate) (CAS 1076199-76-2)
- Terbinafine Impurity 4 (Mixture of Z and E Isomers) (CAS 114311-70-5)
- Terbinafine Impurity 5-d7 (CAS 1185238-58-7)
- Terbinafine-d7 Hydrochloride (CAS 1185240-27-0)
- Terbinafine Impurity 4 (CAS 125660-64-2)
- Terbinafine Impurity 10 (CAS 126764-17-8)
- Terbinafine-d3 HCl (N-methyl-d3) (CAS 1310012-15-7)
Recommended Standards
- Levosimendan impurity 71 (CAS CATO-C4X-130871)
- Isavuconazole Impurity 21 (CAS CATO-C4X-123621)
- Blonanserin Impurity 31 (CAS CATO-C4X-111031)
- 24,24-Difluoro-25-Hydroxyvitamin D3 (CAS 71603-41-3)
- 1-(3-Bromophenyl)imidazole (CAS 25372-02-5)
- Carfilzomib Impurity 93 (CAS CATO-C4X-102293)
- 4-(chloromethyl)-2-isopropoxypyridine (CAS 1249634-97-6)
- Diethyl (4-cyanobenzyl)phosphonate (CAS 1552-41-6)
- 2-((2,6-Dimethylcyclohexyl)amino)-N,N-dimethylacetamide (CAS 1152827-10-5)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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