4-Chloro-1H-1,2,3-triazole CAS 40964-55-4
| CAS No. | 40964-55-4 |
| Molecular Formula | C2H2ClN3 |
| Molecular Weight | 103.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Chloro-1H-1,2,3-triazole is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Chloro-1H-1,2,3-triazole (CAS 40964-55-4) is a high-purity analytical reference standard with the molecular formula C2H2ClN3 and a molecular weight of 103.51 g/mol.
Based on its molecular formula C2H2ClN3, 4-Chloro-1H-1,2,3-triazole contains a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 103.51 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C2H2ClN3 |
| Molecular Weight | 103.51 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 5-Chloro-1H-1,2,4-triazole (CAS 15182-43-1)
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Recommended Standards
- 3-Chloroisoxazole (CAS 73028-29-2)
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- Methyl 3-[bis[(1,1-dimethylethoxy)carbonyl]amino]-4-bromo-2-thiophenecarboxylate (CAS 1313712-43-4)
- Potassium perfluorononanoate (CAS 21049-38-7)
- Procaterol Impurity N2 (CAS 15572-56-2)
- Methyl 3-((4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)methyl)cyclobutane-1-carboxylate (CAS 2365173-88-0)
- cis-4-Methoxycyclohexanecarbaldehyde (CAS 2409005-17-8)
- Benzyl 2-(4-oxopiperidin-1-yl)acetate (CAS 364056-14-4)
- 1,3,7-Trimethyluric Acid (CAS 5415-44-1)
- Ulipristal-d6 Acetate (CAS 1621894-64-1)
- Des-Gln19-Tirzepatide (CAS CATO-CPTD788954)
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