3,5-Dichloro-1-ethyl-1H-1,2,4-triazole CAS 1256643-69-2
| CAS No. | 1256643-69-2 |
| Molecular Formula | C4H5Cl2N3 |
| Molecular Weight | 166.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 166.01 g/mol gives 3,5-Dichloro-1-ethyl-1H-1,2,4-triazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 3,5-Dichloro-1-ethyl-1H-1,2,4-triazole (CAS 1256643-69-2), a certified reference material (molecular formula C4H5Cl2N3, MW 166.01 g/mol) for analytical method development and quality control.
3,5-Dichloro-1-ethyl-1H-1,2,4-triazole (C4H5Cl2N3) contains a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C4H5Cl2N3 |
| Molecular Weight | 166.01 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Dichloro Standards
- (4,5-Dichloro-1H-pyrrol-2-yl)methanol (CAS 1936490-60-6)
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Recommended Standards
- 2,4-Bis(chloromethyl)oxazole (CAS 1240613-80-2)
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- 3,5-Diamino-2-methylphenylboronic acid (CAS 89892-80-8)
- 4-(3,5-Dioxo-1,2,4-triazolidin-1-yl)benzoic acid (CAS 1087784-49-3)
- 1-(1-Aminobutan-2-yl)-3-methylcyclohexan-1-ol (CAS 1558704-26-9)
- 1-Fluoro-3-(2-nitrovinyl)benzene (CAS 705-84-0)
- Ethyl 2-(aminomethyl)-5-methylthiazole-4-carboxylate dihydrochloride (CAS 2137695-98-6)
- (4-Phenylpiperidin-4-yl)methanamine (CAS 761355-17-3)
- Methyl 4,4-dimethyl-2-oxocyclopentane-1-carboxylate (CAS 60585-44-6)
- trans-4-(3-Methylbenzoyl)cyclohexane-1-carboxylic acid (CAS 736136-03-1)
- 2-(4-Hydrazinylphenyl)acetonitrile (CAS 57411-91-3)
- (5-((Benzylamino)methyl)furan-2-yl)methanol (CAS 1240163-58-9)
- Semaglutide impurity 95 (CAS CATO-C4X-222695)
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