4-Bromo-3-isopropyl-1-methyl-1H-pyrazole CAS 1503567-56-3
| CAS No. | 1503567-56-3 |
| Molecular Formula | C7H11BrN2 |
| Molecular Weight | 203.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-3-isopropyl-1-methyl-1H-pyrazole (C7H11BrN2) 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.
4-Bromo-3-isopropyl-1-methyl-1H-pyrazole (CAS 1503567-56-3) is a high-purity analytical reference standard with the molecular formula C7H11BrN2 and a molecular weight of 203.08 g/mol.
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-isopropyl-1-methyl-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 | C7H11BrN2 |
| Molecular Weight | 203.08 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.) | 1992 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 6-bromo-4-methyl-pyridine-3-carbonitrile (CAS 1003711-35-0)
- 6-Bromo-2-methylhept-6-en-3-yn-2-ol (CAS 100379-06-4)
- 4-Bromo-1-(butan-2-yl)-1h-pyrazole (CAS 1179304-86-9)
- 4-Bromo-1-isobutyl-1H-pyrazole (CAS 1184394-32-8)
- 2-Bromo-1,2-dicyclopropylethan-1-one (CAS 1187384-08-2)
- 5-Bromo-1-isopropyl-2-methyl-1H-imidazole (CAS 1204228-25-0)
- 2-(2-bromo-3-pyridyl)acetonitrile (CAS 1211523-71-5)
- 3-Bromo-5,5-dimethylcyclohex-2-en-1-one (CAS 13271-49-3)
Recommended Standards
- 5-(Bromomethyl)-1-ethyl-3-methyl-1h-pyrazole (CAS 1491458-30-0)
- 4-Bromo-1-isopropyl-5-methyl-1H-pyrazole (CAS 1506667-04-4)
- 5-(2-Bromoethyl)-1-ethyl-1h-imidazole (CAS 1466739-88-7)
- 5-Bromo-1-(tert-butyl)-1H-pyrazole (CAS 1512164-79-2)
- 2,4-Dichloro-6-(dibenzo[b,d]furan-2-yl)-1,3,5-triazine (CAS 1699739-77-9)
- 8,11-Dimethoxy-10H-[1,3]dioxolo[4,5-b]xanthen-10-one (CAS 145523-71-3)
- Salicylamide-O-acetic acid (CAS 25395-22-6)
- Methyl 2-amino-5-(anilinocarbonyl)-4-methylthiophene-3-carboxylate (CAS 200277-85-6)
- 2-(Difluoromethyl)-3-fluoro-4-hydroxypyridine-5-carboxaldehyde (CAS 1806966-60-8)
- 1-{2-ethylimidazo[1,2-a]pyridin-6-yl}piperidine-3-carboxylic acid (CAS 1507607-87-5)
- (2Z)-3-[2-(4-Chlorophenyl)-7-methylimidazo[1,2-a]pyridin-3-yl]-2-[3-(trifluoromethyl)phenyl]prop-2-enenitrile (CAS 477847-67-9)
- 2-((1,2,2-Trifluorovinyl)thio)ethan-1-ol (CAS 929971-48-2)
- Trimetazidine Impurity 23 HCl (CAS CATO-C4X-180323)
- Antifreeze Polypeptide 6 (winter flounder) trifluoroacetate salt (CAS 122604-16-4)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com