2-(4-Chlorophenyl)-1,2-dihydro-5-phenyl-3H-1,2,4-triazol-3-one CAS 19081-66-4
| CAS No. | 19081-66-4 |
| Molecular Formula | C14H11ClN3O |
| Molecular Weight | 272.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-(4-Chlorophenyl)-1,2-dihydro-5-phenyl-3H-1,2,4-triazol-3-one (CAS 19081-66-4), molecular formula C14H11ClN3O and molecular weight 272.71 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-(4-Chlorophenyl)-1,2-dihydro-5-phenyl-3H-1,2,4-triazol-3-one (C14H11ClN3O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.5, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 272.71 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C14H11ClN3O |
| Molecular Weight | 272.71 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chlorophenyl Standards
- 2-(2-Chlorophenyl)-1,2-dihydro-5-phenyl-3H-1,2,4-triazol-3-one (CAS 246848-58-8)
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