3,4-Dibromo-1-methyl-1H-pyrazol-5-amine CAS 1426958-35-1
| CAS No. | 1426958-35-1 |
| Molecular Formula | C4H5Br2N3 |
| Molecular Weight | 254.91 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3,4-Dibromo-1-methyl-1H-pyrazol-5-amine (CAS 1426958-35-1), a certified reference material (molecular formula C4H5Br2N3, MW 254.91 g/mol) for analytical method development and quality control.
3,4-Dibromo-1-methyl-1H-pyrazol-5-amine (C4H5Br2N3) 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.
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 | C4H5Br2N3 |
| Molecular Weight | 254.91 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, 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 | 3 |
Related Dibromo Standards
- 3,5-Dibromo-1-ethyl-1H-1,2,4-triazole (CAS 1206092-46-7)
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Recommended Standards
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- Pyrido[3,4-b]pyrazine (CAS 254-86-4)
- methyl 5-chloro-1H-indole-2-carboxylate (CAS 87802-11-7)
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- 2,5-Diamino-1,8-dihydroxyanthracene-9,10-dione (CAS 29706-46-5)
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- Peptide Impurity 64 (CAS CATO-CPTD788964)
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