3-Bromo-4-chloro-5-methyl-1H-pyrazole CAS 740807-52-7
| CAS No. | 740807-52-7 |
| Molecular Formula | C4H4BrClN2 |
| Molecular Weight | 195.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Bromo-4-chloro-5-methyl-1H-pyrazole is closely related to a nitrile group, chlorine/bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 3-Bromo-4-chloro-5-methyl-1H-pyrazole (CAS 740807-52-7), a certified reference material (molecular formula C4H4BrClN2, MW 195.44 g/mol) for analytical method development and quality control.
Based on its molecular formula C4H4BrClN2, 3-Bromo-4-chloro-5-methyl-1H-pyrazole contains a nitrile group, chlorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 195.44 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 3-Bromo-4-chloro-5-methyl-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H4BrClN2 |
| Molecular Weight | 195.44 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.) | 1986 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-5-chloro-1-methyl-1H-pyrazole (CAS 1350323-81-7)
- 4-Bromo-3-chloro-1-methyl-1H-pyrazole (CAS 1350323-83-9)
- 5-Bromo-4-chloro-1-methyl-1H-pyrazole (CAS 1521372-90-6)
- 3-Bromo-5-chloro-1-methyl-1H-pyrazole (CAS 1785538-05-7)
- 4-Bromo-5-chloro-1-methyl-1H-imidazole (CAS 1864014-40-3)
- 2-Bromo-5-(chloromethyl)furan (CAS 337914-79-1)
- 4-Bromo-1-(chloromethyl)-1H-pyrazole (CAS 861001-09-4)
- 4-Bromo-3-chloro-5-methyl-1H-pyrazole (CAS 93233-19-3)
Recommended Standards
- 5-Bromo-2-(chloromethyl)-1H-imidazole (CAS 2169055-08-5)
- n-Undecyl-d23 Alcohol (CAS 349553-88-4)
- 1-Chloromethyl-3,5-dichlorobenzene (CAS 3290-06-0)
- 1,4-Dichloro-2-(chloromethyl)benzene (CAS 2745-49-5)
- 1-(2,2-Difluoroethyl)-1H-pyrazol-4-amine (CAS 1006333-08-9)
- 6-Bromo-5-chloropyrrolo[2,1-f][1,2,4]triazin-4(3H)-one (CAS 1703794-44-8)
- 1,3-Dimethyl-2,4,6-trioxo-hexahydro-pyrimidine-5-carbaldehyde (CAS 42604-63-7)
- N5-(2-(Diethylamino)ethyl)pyridine-2,5-diamine (CAS 1018506-04-1)
- Methyl 2-(((trifluoromethyl)sulfonyl)oxy)acetate (CAS 88016-31-3)
- (2S,4S)-4-(4-Benzyl-2-bromophenoxy)-1-(tert-butoxycarbonyl)-2-pyrrolidinecarboxylic acid (CAS 1354486-58-0)
- 17:0-18:1 PE-d5 (CAS 2342575-56-6)
- 3-{3-[(2-chloro-6-fluorophenyl)methoxy]phenyl}-1-(4-methylbenzoyl)-1H-pyrazole (CAS 477711-69-6)
- 5-Amino-2-Methylphenylboronic Acid Pinacol Ester (CAS 882670-69-1)
- Boc-Cholecystokinin Octapeptide (desulfated) (A-1295.0001) (CAS 25687-34-7)
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