Description

4-Bromo-3-Ethyl-5-Methyl-1H-Pyrazole (Saltdata: Free) is a high-purity, functionalized pyrazole derivative serving as a versatile and critical building block in advanced organic synthesis. Its value lies in providing a halogenated, alkyl-substituted heterocyclic core that enables precise molecular construction for research and development. This compound is essential for pharmaceutical chemists and agrochemical researchers developing novel active ingredients, as well as for material scientists working on specialty polymers and ligands.

Application

• Pharmaceutical Intermediate: A key synthon for the development of new drug candidates, particularly in medicinal chemistry programs targeting kinase inhibitors, anti-inflammatory agents, and CNS-active compounds.
• Agrochemical Research: Used in the synthesis of novel herbicides, fungicides, and insecticides, leveraging its heterocyclic structure for bioactivity.
• Ligand Synthesis: Serves as a precursor for creating specialized ligands in coordination chemistry and catalysis, useful in homogeneous catalysis and material science.
• Material Science: Acts as a monomer or functional additive in the development of advanced polymers with specific thermal or optical properties.
• Chemical Biology: Employed as a molecular probe or tag in biochemical research due to its reactive bromine handle for further functionalization.
• Custom Synthesis & Scale-Up: An ideal starting material for contract research organizations (CROs) and CDMOs performing custom synthesis for client projects from milligram to kilogram scale.

Basic Information

Item	Details
Product Name	4-Bromo-3-Ethyl-5-Methyl-1H-Pyrazole (Saltdata: Free)
CAS No.	736073-76-0
Molecular Formula	C6H9BrN2
Molecular Weight	189.05 g/mol
Synonyms	4-Bromo-3-ethyl-5-methyl-1H-pyrazole; 1H-Pyrazole, 4-bromo-3-ethyl-5-methyl-; 3-Ethyl-5-methyl-4-bromo-1H-pyrazole; 4-Bromo-3-ethyl-5-methylpyrazole; 736073-76-0; SCHEMBL21806227; BRN 15287565
EINECS	Contact for details

Quality Control

Our 4-Bromo-3-Ethyl-5-Methyl-1H-Pyrazole is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and NMR for structural confirmation, to meet the stringent requirements of research and development applications. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep the container sealed to protect this light-sensitive compound from degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.