5-bromo-4-chloro-1H-pyrazole CAS 27258-12-4
| CAS No. | 27258-12-4 |
| Molecular Formula | C3H6BrClN2 |
| Molecular Weight | 185.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-bromo-4-chloro-1H-pyrazole (CAS 27258-12-4), molecular formula C3H6BrClN2 and molecular weight 185.45 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H6BrClN2, 5-bromo-4-chloro-1H-pyrazole contains chlorine/bromine substitution; these features give the compound characteristic molecular-ion distribution patterns in mass spectrometry. The molecular weight of 185.45 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 5-bromo-4-chloro-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 | C3H6BrClN2 |
| Molecular Weight | 185.45 g/mol |
| 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related bromo Standards
- 2-Bromo-2-methylpropanoyl chloride (CAS 20469-89-0)
- 1-Bromo-5-chloropentane (CAS 54512-75-3)
- 3-Bromo-2-oxopropanoyl chloride (CAS 75261-25-5)
- 4-Bromo-2,3-dimethylanisole (CAS 1174906-84-3)
- 1-Bromo-2,5-octadiyne (CAS 1558-79-8)
- 1-Bromo-2-ethylbenzene (CAS 1973-22-4)
- 1-Bromo-3-ethylbenzene (CAS 2725-82-8)
- 4-Bromo-m-xylene (CAS 583-70-0)
Recommended Standards
- Elagolix Impurity 19 (CAS 927-58-2)
- Azathioprine Impurity 13 (CAS 873-25-6)
- 3,4,5-Trichloro-1-methyl-1H-pyrazole (CAS 90445-57-1)
- 3-Chloro-2,4,5,6-tetrafluoropyridine (CAS 1735-84-8)
- N-(4-(Dimethylamino)phenyl)-2-((4-ethyl-5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 577786-91-5)
- Butyl[(2e)-3-(2-methoxyphenyl)prop-2-en-1-yl]amine hydrochloride (CAS 1240590-87-7)
- (R)-2-(3-(Benzyl(isopropyl)amino)piperidin-1-yl)acetic acid (CAS 1354008-06-2)
- 1-Oxaspiro[2.3]hexane (CAS 157-48-2)
- 1-(tert-Butyl) 2-methyl (S)-4-(trifluoromethyl)-2,5-dihydro-1H-pyrrole-1,2-dicarboxylate (CAS 1398113-32-0)
- 1, 2-Ethanedisulfonic acid, 1,2-dihydroxy-, disodium salt 1,2-Dihydroxy-1,2-ethanedisulfonate 1,2-Dihydroxy-1,2-ethanedisulfonic acid 1,2-dihydroxyethane-1,2-disulfonic acid 517-21-5 Disodium 1,2-dihydroxy-1,2-ethanedisulfonate Glyoxal bisulfite Glyoxal bisulphite Glyoxal disodium bisulfite Glyoxal disodium bisulfite (*disodium salt*) Glyoxal-sodium bisulfite Glyoxal-sodium bisulfite (*disodium salt*) Glyoxal-sodium bisulfite adduct (1:2) Glyoxal-sodium-bisulfite Glyoxal-sodium-bisulfite (*disodium salt*) NSC18262 Sodium glyoxal bisulfite Sodium glyoxal bisulfite (*disodium salt*) (CAS 517-21-5)
- 4-(Aminomethyl)-3-isopropoxyphenol (CAS 1243285-73-5)
- 3-[1-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)cyclohexyl]-1-(2-fluorophenyl)urea (CAS 1396876-55-3)
- FBA 393 (CAS 1533-45-5)
- Tirzepatide (CAS 2023788-19-2)
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