1-Methyl-1,2,3-triazole CAS 16681-65-5
| CAS No. | 16681-65-5 |
| Molecular Formula | C3H5N3 |
| Molecular Weight | 83.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 83.09 g/mol gives 1-Methyl-1,2,3-triazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-Methyl-1,2,3-triazole (CAS 16681-65-5), molecular formula C3H5N3 and molecular weight 83.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H5N3, 1-Methyl-1,2,3-triazole contains a nitrile group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 83.09 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.
As a certified reference material (CRM), 1-Methyl-1,2,3-triazole 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.
Physical & Chemical Properties
| Molecular Formula | C3H5N3 |
| Molecular Weight | 83.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 1H-1,4-Triazole, 3-methyl- 3-Methyl-1,4-triazole 3-Methyl-4H-1,4-triazole 7170-01-6 NSC-202575 NSC202575 s-Triazole, 3-methyl- (CAS 7170-01-6)
- 1,2,4-Triazole-<SUP>15</SUP>N<SUB>3</SUB> (CAS 1173023-70-5)
- 1H-1,2,4-Triazole-3,5-13C2 (CAS 1773496-71-1)
- 1H-1,2,3-Triazole-4-carbonitrile (CAS 18755-49-2)
- 1,2,4-Triazole-d3 (CAS 43088-92-2)
- 1H-[1,2,3]Triazole-4-Carbaldehyde (CAS 16681-68-8)
- 1H-1,2,3-Triazole-1-carbaldehyde (CAS 959960-46-4)
- 2H-1,2,3-Triazole-4-carbaldehyde (CAS 4343-71-9)
Recommended Standards
- Allyl isocyanate (CAS 1476-23-9)
- 4-Hydroxy-2-butenenitrile (CAS 19060-14-1)
- Cyclopropanone Cyanohydrin (CAS 14743-56-7)
- 4-Methyl-2H-1,2,3-triazole (CAS 19230-71-8)
- 7-(Trifluoromethyl)imidazo[1,2-a]pyrimidine-6-carboxylic acid (CAS 1260847-63-9)
- 3-(Dimethyl-1,3-oxazol-2-yl)aniline (CAS 827582-20-7)
- 2-(chloromethyl)-4-methoxy-6-methylpyrimidine (CAS 89966-99-4)
- 5-Methyl-7-(trifluoromethyl)-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 313387-24-5)
- Potassium trifluoro(2-fluoro-5-methoxyphenyl)boranuide (CAS 1985700-38-6)
- 2-Mercapto-3-phenyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one (CAS 300557-77-1)
- Ethyl-(3-trifluoromethoxy-propyl)-amine (CAS 1208078-98-1)
- Tert-butyl 2-(3-(4-nitrophenyl)-1H-pyrazol-1-yl)acetate (CAS 1355334-94-9)
- Dinitrato(1,10-phenanthroline)copper(II) (CAS 19319-88-1)
- Semaglutide impurity 45 (CAS CATO-C4X-222645)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com