4-Bromo-3-chloro-1H-pyrazole CAS 27258-18-0
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 27258-18-0 |
| Molecular Formula | C3H2BrClN2 |
| Molecular Weight | 181.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Bromo-3-chloro-1H-pyrazole (CAS 27258-18-0), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C3H2BrClN2. Molecular weight: 181.42 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C3H2BrClN2 |
| Molecular Weight | 181.42 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.) | 1964 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 1,2,3-Trichlorobenzene (CAS 87-61-6)
- 1,2,4-Trichlorobenzene (CAS 120-82-1)
- 1,3,5-Trichlorobenzene (CAS 108-70-3)
- 2-(4-Bromophenyl)-6-phenyl-4-(trifluoromethyl)pyridine-3-carbonitrile (CAS 478068-10-9)
- 2-Amino-1-(m-tolyl)ethan-1-ol hydrochloride (CAS 1009330-42-0)
- 2-(4-Fluorophenoxy)-2-methylpropanoic Acid (CAS 587-11-1)
- Methyl 5-methyl-4-((3-nitro-1h-pyrazol-1-yl)methyl)isoxazole-3-carboxylate (CAS 1011350-32-5)
- 1-Amino-3-methyl-2-(1-pyrrolidinyl)butane (CAS 929343-27-1)
- 6-Chloro-8-ethynylimidazo[1,5-a]pyridine (CAS 2767259-27-6)
- Liraglutide Impurity 13 TFA Salt (CAS CATO-C4X-199213)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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