1,3-Dimethyl-1H-1,2,4-triazole CAS 16778-76-0
| CAS No. | 16778-76-0 |
| Molecular Formula | C4H7N3 |
| Molecular Weight | 97.12 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.
1,3-Dimethyl-1H-1,2,4-triazole (CAS 16778-76-0), molecular formula C4H7N3 and molecular weight 97.12 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, 1,3-Dimethyl-1H-1,2,4-triazole is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 97.12 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C4H7N3 |
| Molecular Weight | 97.12 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 Dimethyl Standards
- 3,4-dimethyl-4H-1,2,4-triazole (CAS 16778-74-8)
- 2,2-Dimethyl-3-oxopropanenitrile (CAS 19295-56-8)
- 3,5-Dimethyl-4H-1,2,4-triazole (CAS 7343-34-2)
- 4,5-Dimethyl-1H-1,2,3-triazole (CAS 42964-73-8)
- 2,5-Dimethyl-3,4-dihydro-2H-pyrrole (CAS 822-64-0)
- 2,5-Dimethyl-3-pyrroline, mixture of cis and trans 59480-92-1 (CAS 59480-92-1)
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- Dimethyl-<SUP>13</SUP>C<SUB>2</SUB> disulfide (CAS 1173019-13-0)
Recommended Standards
- (1R,5S)-3-Azabicyclo[3.1.0]hexan-2-one (CAS 169532-12-1)
- 1-Ethyl-1,2,4-triazole (CAS 16778-70-4)
- 1-methoxycyclopropane-1-carbonitrile (CAS 1695475-96-7)
- (R)-Tetrahydrofuran-2-carbonitrile (CAS 164472-78-0)
- 5-Carbamoyl-1H-pyrazole-4-carboxylic acid (CAS 145147-06-4)
- Azidomethylcyclopentane (CAS 455256-35-6)
- N-(2,6-Difluorophenyl)-2-methoxybenzamide (CAS 1065134-54-4)
- 6-Fluoro-2-oxo-1,2-dihydroquinoline-3-carbaldehyde (CAS 846556-45-4)
- (5-(2,2,2-Trifluoroethoxy)pyridin-3-yl)boronic acid (CAS 1350513-17-5)
- (3aR,6aS)-tert-Butyl hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (CAS 2803135-37-5)
- 5-(Ethylsulfonyl)-4-(p-tolyl)pyrimidin-2-amine (CAS 1707571-52-5)
- 2,2'-((2-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)ethyl)azanediyl)diacetic acid (CAS 207612-92-8)
- 2,5-Dichloro-3-(2-thiomethylphenyl)propiophenone (CAS 898780-49-9)
- Tirzepatide Impurity 15 (CAS CATO-C4X-324015)
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