5-Bromo-2-ethyl-1,2-dihydro-3H-1,2,4-triazol-3-one CAS 1243250-10-3
| CAS No. | 1243250-10-3 |
| Molecular Formula | C4H6BrN3O |
| Molecular Weight | 192.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Bromo-2-ethyl-1,2-dihydro-3H-1,2,4-triazol-3-one (CAS 1243250-10-3), molecular formula C4H6BrN3O and molecular weight 192.01 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a hydroxyl group, an ether linkage, bromine substitution, 5-Bromo-2-ethyl-1,2-dihydro-3H-1,2,4-triazol-3-one is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 192.01 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C4H6BrN3O |
| Molecular Weight | 192.01 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.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- (4-Bromo-5-methylisoxazol-3-yl)methanol (CAS 1040278-91-8)
- 1-(3-Bromo-isoxazol-5-yl)-ethanol (CAS 105174-96-7)
- (4-Bromo-3-methylisoxazol-5-yl)methanol (CAS 1092301-43-3)
- Ethyl 2-Bromo-2-cyanoacetate (CAS 1187-46-8)
- 3-Bromo-5-(methoxymethyl)isoxazole (CAS 1220521-36-7)
- 5-Bromo-2-methyl-4-oxazolemethanol (CAS 1240601-93-7)
- (2-Bromo-5-methyl-oxazol-4-yl)-methanol (CAS 1240612-18-3)
- 3-Bromo-5-methoxy-1-methyl-1H-1,2,4-triazole (CAS 1306739-06-9)
Recommended Standards
- 5-(Bromomethyl)-3-methoxyisoxazole (CAS 14423-89-3)
- (3-Bromo-4-methylisoxazol-5-yl)methanol (CAS 153124-36-8)
- (3-Bromo-5-methyl-isoxazol-4-yl)-methanol (CAS 153124-37-9)
- o-((5-Bromofuran-2-yl)methyl)hydroxylamine (CAS 1541911-09-4)
- (4-((3-((tert-Butoxycarbonyl)amino)propyl)carbamoyl)phenyl)boronic acid (CAS 2304634-43-1)
- Ethyl(p-tolyl)sulfane (CAS 622-63-9)
- 1-(tert-Butoxycarbonyl)-4,6-difluoroindoline-2-carboxylic acid (CAS 2137451-45-5)
- Mesobilirubin (CAS 16568-56-2)
- 3-Acetyl-N-(5-iodopyridin-2-yl)-5-methylisoxazole-4-carboxamide (CAS 339018-07-4)
- Methyl 2-(3-bromo-5,7-difluoroquinolin-6-yl)acetate (CAS 1022092-10-9)
- 2,5-Dichloro-1,8-dihydroxyanthracene-9,10-dione (CAS 52547-60-1)
- 2,5-Dimethoxy-4-formylbenzoic acid (CAS 94930-47-9)
- 5-(Difluoromethyl)-3-iodo-2-methoxypyridin-4-amine (CAS 1805961-60-7)
- Protein Kinase C (19-36) Peptide (CAS 113731-96-7)
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