3-Bromo-1H-pyrazol-1-ol CAS 384339-47-3
| CAS No. | 384339-47-3 |
| Molecular Formula | C3H3BrN2O |
| Molecular Weight | 162.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Bromo-1H-pyrazol-1-ol.
3-Bromo-1H-pyrazol-1-ol (CAS 384339-47-3) is a high-purity analytical reference standard with the molecular formula C3H3BrN2O and a molecular weight of 162.97 g/mol.
3-Bromo-1H-pyrazol-1-ol (C3H3BrN2O) contains an amide group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), 3-Bromo-1H-pyrazol-1-ol meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C3H3BrN2O |
| Molecular Weight | 162.97 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.) | 2025 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 2-Bromo-2-cyanoacetamide (CAS 1113-55-9)
- 3-Bromo-4-methyl-1,2,5-oxadiazole (CAS 1691751-23-1)
- 2-Bromo-5-methyl-1,3,4-oxadiazole (CAS 864750-58-3)
- 3-Bromo-2H-furan-5-one (CAS 56634-50-5)
- 4-Bromo-1H-pyrazol-1-ol (CAS 87844-44-8)
- 5-Bromo-2,5-dihydrofuran-2-one (CAS 40125-53-9)
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Recommended Standards
- 3-(Bromomethyl)-1,2,5-oxadiazole (CAS 849415-41-4)
- 3-(Bromomethyl)-1,2,4-oxadiazole (CAS 540524-13-8)
- 3-Bromofuran-2(5H)-one (CAS 76311-89-2)
- 2-Bromofuran-3-ol (CAS 859999-09-0)
- rac-1-Stearoyl-3-Chloropropanediol-d5 (CAS 1795785-84-0)
- Methyl(4-phenoxyphenyl)sulfane (CAS 21134-14-5)
- (R)-3-Amino-7-((tert-butoxycarbonyl)amino)heptanoic acid (CAS 2165435-43-6)
- 2-((5-(5-Chlorothiophen-2-yl)-1,3,4-oxadiazol-2-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide (CAS 850937-46-1)
- 5-Iodo-2-methoxy-3-(trifluoromethyl)benzonitrile (CAS 1445995-74-3)
- [(4-Methylphenyl)amino]acetic acid (CAS 21911-69-3)
- 7-Methylpyrrolo[2,3-b]pyridine-3-boronic acid (CAS 1260536-49-9)
- 2-Chloro-5-(trifluoromethyl)quinoxaline (CAS 1823960-79-7)
- 1-[(4-Chlorophenyl)methyl]-2-oxo-5-phenyl-1,2-dihydropyridine-3-carbonitrile (CAS 866038-58-6)
- Neuropeptide Y (3-36) (porcine) trifluoroacetate salt (CAS 143863-88-1)
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