3,4,5-Tribromo-1-methyl-pyrazole CAS 57389-75-0
| CAS No. | 57389-75-0 |
| Molecular Formula | C4H3Br3N2 |
| Molecular Weight | 318.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 3,4,5-Tribromo-1-methyl-pyrazole (C4H3Br3N2) is characterized by a nitrile group, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 3,4,5-Tribromo-1-methyl-pyrazole (CAS 57389-75-0), a certified reference material (molecular formula C4H3Br3N2, MW 318.79 g/mol) for analytical method development and quality control.
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 | C4H3Br3N2 |
| Molecular Weight | 318.79 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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.) | 1973 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Tribromo Standards
- 2,4,5-Tribromo-1-methylimidazole (CAS 1003-91-4)
- 1,1,1-Tribromo-2-methylpropan-2-ol (CAS 76-08-4)
- 3,4,5-Tribromo-1H-pyrrole-2-carbonitrile (CAS 130511-67-0)
- 1,2,3-Tribromo-5-methylbenzene (CAS 73557-59-2)
- 1,3,5-Tribromo-2-methylbenzene (CAS 6320-40-7)
- 3,4,5-Tribromo-2-methylpyridine (CAS 1188140-82-0)
- 2,3,4-Tribromo-6-methylpyridine (CAS 1803883-62-6)
- 2,3,5-Tribromo-4-methylpyridine (CAS 3430-25-9)
Recommended Standards
- 2-(4-(4-Chlorobenzyl)phenoxy)-2-methylbutanoic acid (CAS 71548-88-4)
- tert-Butyl 4-(benzyloxy)-3-chlorobenzoate (CAS 2379322-84-4)
- 2-[3-(2-Chloro-phenyl)-propyl]-6-methoxy-benzoic acid methyl ester (CAS 1171923-84-4)
- Propafenone EP Impurity E (CAS 165279-79-8)
- 5-Bromo-8-methyl-1,2,3,4-tetrahydroquinoline (CAS 1157721-71-5)
- 2-(2H-1,3-Benzodioxol-5-yl)imidazo[1,2-a]pyrimidine-3-carbaldehyde (CAS 893612-32-3)
- 8-Bromo-1,3,4,5-tetrahydropyrano[4,3-b]indole (CAS 1498526-30-9)
- 7-Chloro-2-methyl-2H-pyrazolo[3,4-d]pyridazine (CAS 1823960-49-1)
- 4-Cyclopropoxy-1-ethyl-2-(trifluoromethyl)benzene (CAS 1243400-39-6)
- 2-Oxo-4-phenyl-pyrrolidine-3-carboxylic acid 2-oxo-4-phenylpyrrolidine-3-carboxylic acid 77519-55-2 (CAS 77519-55-2)
- 4-Cyano-1-methylpyridin-1-ium iodide (CAS 1194-04-3)
- 5-(6-Chloropyridin-3-yl)-3-(3,4-dimethylphenyl)-1,2,4-oxadiazole (CAS 1710644-31-7)
- Linaclotide Impurity 31 (CAS CATO-C4X-210631)
- Peptide 440 (CAS CATO-CPTD788440)
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