4-Bromopyrazole-3-carboxylic Acid CAS 13745-17-0
| CAS No. | 13745-17-0 |
| Molecular Formula | C4H3BrN2O2 |
| Molecular Weight | 190.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Bromopyrazole-3-carboxylic Acid 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.
CATO supplies 4-Bromopyrazole-3-carboxylic Acid (CAS 13745-17-0), a certified reference material (molecular formula C4H3BrN2O2, MW 190.98 g/mol) for analytical method development and quality control.
Based on its molecular formula C4H3BrN2O2, 4-Bromopyrazole-3-carboxylic Acid contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 190.98 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C4H3BrN2O2 |
| Molecular Weight | 190.98 g/mol |
| Appearance | Off-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 sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1960 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromopyrazole Standards
- 5-Bromopyrazole-3-carboxylic Acid (CAS 1328893-16-8)
- Methyl 4-Bromopyrazole-3-carboxylate (CAS 81190-89-8)
- 4-Bromopyrazole-3-carbaldehyde (CAS 287917-97-9)
- 4-Bromopyrazole-3-carbonitrile (CAS 288246-16-2)
- Ethyl 3-Bromopyrazole-4-carboxylate (CAS 1353100-91-0)
- 3-Bromopyrazole (CAS 14521-80-3)
- 1-Boc-4-bromopyrazole (CAS 1150271-23-0)
Recommended Standards
- 3-Bromofuran-2-carboxylic Acid (CAS 14903-90-3)
- 3-Bromoisoxazole-5-carboxamide (CAS 1241897-93-7)
- 3-Bromo-1H-pyrazole-4-carboxylic acid (CAS 1502986-45-9)
- 4-Bromofuran-3-carboxylic acid (CAS 116779-79-4)
- 3-(2,4-Dichlorophenyl)-5-methyl-1,2-oxazole-4-carboxylic acid (CAS 4402-78-2)
- 1-[4-(butan-2-yl)phenyl]-2-methylpropan-1-amine (CAS 847837-45-0)
- 3-Chloro-4-ethylbenzophenone (CAS 82520-41-0)
- 1030497-05-2 5-Oxo-5-[3-(1-piperidinylcarbonyl)anilino]-pentanoic acid 7728AC C17H22N2O4 (CAS 1030497-05-2)
- (2S,5S)-5-(4-chlorobenzyl)-2-methylmorpholin-3-one (CAS 2088453-96-5)
- 4'-Bromo-3,4-difluoro-5-methoxy-1,1'-biphenyl (CAS 1443341-73-8)
- 5-(Benzyloxy)-4-methoxy-2-nitrobenzoic acid (CAS 60564-37-6)
- 6-Chloro-8-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 105679-36-5)
- 1-(3-(Methylthio)phenyl)ethanone (CAS 1441-99-2)
- Insulin Degludec Impurity 20 (CAS CATO-C4X-215720)
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