5-Chloro-2-(1H-1,2,4-triazol-1-yl)benzaldehyde CAS 1329166-77-9
| CAS No. | 1329166-77-9 |
| Molecular Formula | C9H6ClN3O |
| Molecular Weight | 207.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Chloro-2-(1H-1,2,4-triazol-1-yl)benzaldehyde (CAS 1329166-77-9), molecular formula C9H6ClN3O and molecular weight 207.62 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Chloro-2-(1H-1,2,4-triazol-1-yl)benzaldehyde (C9H6ClN3O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C9H6ClN3O |
| Molecular Weight | 207.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 2-(3-Chloro-pyridin-2-yl)-pyrimidin-4-ol (CAS 1089330-88-0)
- 4-chloro-2-(1H-1,2,4-triazol-1-yl)benzaldehyde (CAS 1310531-91-9)
- 6-Chloro-2-(pyridin-2-yl)pyrimidin-4(3H)-one (CAS 1373423-95-0)
- 2-Chloro-4-(1H-1,2,4-triazol-1-yl)benzaldehyde (CAS 1416980-76-1)
- 5-Chloro-6-(pyridin-3-yl)pyrimidin-4-ol (CAS 1443292-22-5)
- 6-Chloro-2-(pyridin-4-yl)pyrimidin-4(3H)-one (CAS 1706454-79-6)
- 6-Chloro-2-(pyridin-3-yl)pyrimidin-4(3H)-one (CAS 1706455-95-9)
- 3-(6-Chloro-9H-purin-9-yl)propanenitrile (CAS 4244-40-0)
Recommended Standards
- 1-(2-Chlorophenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1325724-90-0)
- 1-Phenyl-1H-1,2,3-triazole-4-carbonyl chloride (CAS 134541-91-6)
- 1-(2-Chloropyrimidin-4-yl)-1H-pyrrole-2-carbaldehyde (CAS 1355229-53-6)
- 1-(4-Chlorophenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 113934-27-3)
- Diethyl 2-(2-(4-chlorophenyl)-2-oxoethyl)-2-hydroxymalonate (CAS 400086-35-3)
- N,N-Diphenyl-4-vinylaniline (CAS 25069-74-3)
- 1H-Pyrazolo[3,4-d]pyrimidine-4,6(3aH,5H)-dione (CAS 1049677-62-4)
- 3-Cyclopropoxy-5-iodopicolinic acid (CAS 1243318-81-1)
- Gestrinone Impurity 8 (CAS 116256-39-4)
- Tenofovir Impurity 82 (CAS CATO-C4X-107682)
- 1-(3-Fluorophenyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 1020046-35-8)
- 4-(4-Fluorophenyl)-2,6-diphenylpyridine (CAS 1498-83-5)
- Ilaprazole Impurity 5 (CAS 2285346-44-1)
- Palmitoyl Tripeptide-1 HCl (CAS 2757690-14-3)
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