4-Bromo-3-ethoxy-1H-pyrazole CAS 59329-71-4
| CAS No. | 59329-71-4 |
| Molecular Formula | C5H7BrN2O |
| Molecular Weight | 191.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Bromo-3-ethoxy-1H-pyrazole is closely related to an amide group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Bromo-3-ethoxy-1H-pyrazole (CAS 59329-71-4), molecular formula C5H7BrN2O and molecular weight 191.03 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a hydroxyl group, an ether linkage, bromine substitution, 4-Bromo-3-ethoxy-1H-pyrazole is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 191.03 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 4-Bromo-3-ethoxy-1H-pyrazole 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 | C5H7BrN2O |
| Molecular Weight | 191.03 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.) | 1973 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 2-Bromo-1-(methoxymethyl)-1H-imidazole (CAS 1001755-89-0)
- 4-Bromo-1-(methoxymethyl)-1H-pyrazole (CAS 1071200-42-4)
- 1-(3-Bromo-1,2-oxazol-5-yl)ethan-1-amine (CAS 1187930-15-9)
- 2-(3-Bromo-1H-pyrazol-1-yl)ethanol (CAS 1233525-80-8)
- 5-Bromo-N,N-dimethyl-1H-1,2,4-triazol-3-amine (CAS 1243250-05-6)
- 3-Bromo-5-propyl-1,2,4-oxadiazole (CAS 1256643-63-6)
- (4-Bromo-1-methyl-1h-pyrazol-5-yl)methanol (CAS 1276056-83-7)
- 2-Bromo-5-(propan-2-yl)-1,3,4-oxadiazole (CAS 1368797-26-5)
Recommended Standards
- 4-Bromo-1,2-dimethyl-1,2-dihydro-3H-pyrazol-3-one (CAS 29801-01-2)
- 4-Bromo-6-methyl-4,5-dihydropyridazin-3(2H)-one (CAS 89095-36-3)
- 4-[(1-Azetidinyl)methyl]phenylboronic acid (CAS 2246662-21-3)
- 5-(3-bromopropyl)-1H-1,2,3,4-tetrazole (CAS 868600-66-2)
- 4-(Difluoromethyl)-6-methoxypyridine-3-sulfonyl chloride (CAS 1804689-28-8)
- 4-(5-Fluoroindolin-1-yl)-4-oxobutanoic acid (CAS 393183-92-1)
- 2-Amino-7-methoxy-1,3-benzoxazole-5-carbaldehyde (CAS 1820607-78-0)
- 5,6-Dimethyl-1-oxaspiro[2.5]octane (CAS 1342404-38-9)
- 1-[4-(Bromomethyl)benzyl]pyrazole (CAS 222720-87-8)
- tert-Butyl N-[(2-chloro-5-fluorophenyl)methyl]carbamate (CAS 1881295-87-9)
- 2,8-Diazaspiro[5.5]undecane (CAS 180-50-7)
- 5-Fluoro-3,3-dimethylindolin-2-one (CAS 866209-99-6)
- 5-Bromo-1,3-dimethyl-2-nitrobenzene (CAS 76435-22-8)
- D-β-Asp9-Tirzepatide (CAS CATO-CPTD788932)
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