| CAS No. | 84501-67-7 |
| Molecular Formula | C5H9BrN4O |
| Molecular Weight | 221.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 221.06 g/mol gives 1-(2-Bromoethyl)-4-ethyl-1H-tetrazol-5(4H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1-(2-Bromoethyl)-4-ethyl-1H-tetrazol-5(4H)-one (CAS 84501-67-7), a certified reference material (molecular formula C5H9BrN4O, MW 221.06 g/mol) for analytical method development and quality control.
Structurally, 1-(2-Bromoethyl)-4-ethyl-1H-tetrazol-5(4H)-one (C5H9BrN4O) contains an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 221.06 g/mol, it falls into the medium-molecular-weight range. 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.
| Molecular Formula | C5H9BrN4O |
| Molecular Weight | 221.06 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >95% |
| 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.) | 1981 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |