3-Bromo-1-ethyl-5-methyl-1h-pyrazole CAS 1354706-05-0
| CAS No. | 1354706-05-0 |
| Molecular Formula | C6H9BrN2 |
| Molecular Weight | 189.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Bromo-1-ethyl-5-methyl-1h-pyrazole (C6H9BrN2) contains a nitrile group, bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
3-Bromo-1-ethyl-5-methyl-1h-pyrazole (CAS 1354706-05-0), molecular formula C6H9BrN2 and molecular weight 189.05 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C6H9BrN2 |
| Molecular Weight | 189.05 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.) | 1991 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 4-Bromo-1-propyl-1H-imidazole (CAS 1353856-52-6)
- 3-Bromo-1-propyl-1h-pyrazole (CAS 1354706-10-7)
- 2-(2-Bromoethyl)-1-methyl-1h-imidazole (CAS 1343327-75-2)
- 3-Bromo-1-(propan-2-yl)-1h-pyrazole (CAS 1354706-35-6)
- Ac-Gly-BoroPro (CAS 886992-99-0)
- 4-(3-Fluorophenyl)-1,3-dimethyl-1H-1,2,4-triazol-5(4H)-one (CAS 860786-18-1)
- 4-(Difluoromethyl)-6-hydroxypicolinic acid (CAS 1806050-46-3)
- 3-(2-Ethylphenyl)-1-propene (CAS 62826-22-6)
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- 1-(3,4-Dimethylphenyl)propan-2-ol (CAS 27650-62-0)
- (S)-Benzyl 2-(((S)-1-methoxy-4-methyl-1-oxopentan-2-yl)carbamoyl)pyrrolidine-1-carboxylate (CAS 2873-37-2)
- Pyridine-2,4-diyldimethanol (CAS 21071-04-5)
- Alogliptin Impurity 68 (CAS 421552-12-7)
- Tirzepatide Impurity 34 (CAS CATO-C4X-324034)
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