3-Amino-4-bromo-2-methylpyrazole CAS 105675-85-2
| CAS No. | 105675-85-2 |
| Molecular Formula | C4H6BrN3 |
| Molecular Weight | 176.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Amino-4-bromo-2-methylpyrazole (CAS 105675-85-2), molecular formula C4H6BrN3 and molecular weight 176.01 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H6BrN3, 3-Amino-4-bromo-2-methylpyrazole contains a nitrile group, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 176.01 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C4H6BrN3 |
| Molecular Weight | 176.01 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.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Amino Standards
- 5-Amino-3-bromo-1-methylpyrazole (CAS 1357471-14-7)
- 3-Amino-4-bromo-1-methylpyrazole (CAS 146941-72-2)
- 3-Amino-5-bromo-1-methylpyrazole (CAS 89088-55-1)
- 3-Amino-4-chlorobenzyl chloride (CAS 1025055-23-5)
- 5-Amino-2-chlorobenzyl chloride (CAS 1122052-39-4)
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- 4-Amino-3-(difluoromethyl)pyridine-2,6-diol (CAS 1805161-42-5)
Recommended Standards
- 4-Bromo-3,5-dimethylisoxazole (CAS 10558-25-5)
- 1-(2-Bromoethyl)-1,2,3-triazole (CAS 1083172-01-3)
- 5-Bromo-1,4-dimethyl-1H-1,2,3-triazole (CAS 1040275-55-5)
- (5-Bromofuran-3-yl)methanamine (CAS 1201809-75-7)
- RWJ 56110 (CAS 252889-88-6)
- (E)-2-((4-(Dimethylamino)phenyl)diazenyl)benzoic acid (CAS 74886-84-3)
- Rel-(2R,5R)-1,2,5-trimethylpiperazine (CAS 24779-48-4)
- 2-(5-Phenylfuran-2-yl)cyclopropan-1-amine (CAS 1315352-26-1)
- 6-chloro-1H-imidazo[4,5-c]pyridine-4-carbonitrile (CAS 944388-93-6)
- 2-Acetamido-3-cyclopentylpropanoic acid (CAS 99189-63-6)
- tert-Butyl ((2S,3S)-3-methyl-1-oxopentan-2-yl)carbamate (CAS 87694-55-1)
- Apigenin 7-Glucoside (CAS 578-74-5)
- Polaprezinc impurity 36 (CAS CATO-C4X-182136)
- Biotinyl-Pancreatic Polypeptide (human) trifluoroacetate salt (CAS 1816258-36-2)
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