3-Bromo-5-methyl-1H-1,2,4-triazole CAS 26557-90-4
| CAS No. | 26557-90-4 |
| Molecular Formula | C3H4BrN3 |
| Molecular Weight | 161.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Bromo-5-methyl-1H-1,2,4-triazole.
CATO supplies 3-Bromo-5-methyl-1H-1,2,4-triazole (CAS 26557-90-4), a certified reference material (molecular formula C3H4BrN3, MW 161.99 g/mol) for analytical method development and quality control.
Based on its molecular formula C3H4BrN3, 3-Bromo-5-methyl-1H-1,2,4-triazole contains a nitrile group, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.99 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C3H4BrN3 |
| Molecular Weight | 161.99 g/mol |
| Appearance | White to pale 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 3-Bromo-1H-pyrazol-5-amine (CAS 1203705-55-8)
- 5-Bromo-1H-imidazol-2-amine (CAS 1211524-33-2)
- 4-Bromo-1H-pyrazol-1-amine (CAS 122481-11-2)
- 4-Bromo-1-methyl-1,2,3-triazole (CAS 13273-53-5)
- 2-Bromo-1H-imidazol-4-amine (CAS 1373233-52-3)
- 3-Bromo-5-methyl-1H-1,2,4-triazole (CAS 15777-57-8)
- 3-Bromo-4-methyl-4H-1,2,4-triazole (CAS 16681-73-5)
- 1-Bromo-1H-pyrazol-5-amine (CAS 1823380-61-5)
Recommended Standards
- 3-Amino-5-bromopyrazole (CAS 950739-21-6)
- 4-Cyclopropylphenylboronic Acid (CAS 302333-80-8)
- 3,3-Dimethyl-1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborole (CAS 221352-10-9)
- 5-(Bromomethyl)-1H-1,2,4-triazole (CAS 849415-42-5)
- N-(3,5-Dimethylphenyl)-3-((4-fluorophenyl)thio)propanamide (CAS 896358-02-4)
- n-[3-(1h-pyrazol-1-ylmethyl)phenyl]cyclooctanamine (CAS 1157287-96-1)
- 4-Bromomethyl-3-(trifluoromethyl)pyridine (CAS 1227606-67-8)
- (6-(Trifluoromethyl)-[2,4'-bipyridin]-3-yl)methanol (CAS 1227573-18-3)
- 1-(2-Chlorobenzyl)-4-ethylpiperazine (CAS 414874-77-4)
- 1-(3-Nitrophenyl)-3-phenylprop-2-en-1-one (CAS 16619-21-9)
- 1-ethyl-1h-pyraZole-5-carbohydrazide (CAS 1001755-76-5)
- 2-(4-Bromo-2-fluorophenoxy)butanoyl chloride (CAS 2138016-81-4)
- 5-Bromo-1-phenyl-1H-1,2,4-triazole (CAS 21434-15-1)
- Semaglutide impurity 50 (CAS 2773558-66-8)
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