4-Bromo-3-methyl-1H-pyrazole
4-Bromo-3-methyl-1H-pyrazole (CAS: 13808-64-5, Formula: C4H5BrN2, MW: 161.00) is a halogenated heterocyclic building block. This compound is primarily utilised in chemical synthesis, serving as a key intermediate for the development of more complex organic molecules. Its structure, featuring a pyrazole core with bromine and methyl substituents, makes it a valuable reagent in various synthetic pathways. Available from Tech Serve Solutions, it offers researchers and industrial chemists a reliable source for their synthetic needs.

Chemical Synthesis Intermediate
4-Bromo-3-methyl-1H-pyrazole serves as a versatile intermediate in organic synthesis. Its reactive bromine atom allows for facile functionalisation through various coupling reactions, enabling the construction of diverse molecular architectures.
Heterocyclic Compound Development
As a substituted pyrazole, this compound is instrumental in the synthesis of novel heterocyclic systems. These systems are often explored for their potential applications in medicinal chemistry and materials science.
Research and Development
This chemical is widely employed in academic and industrial research laboratories. It provides a foundational structure for exploring new synthetic methodologies and discovering compounds with specific biological or material properties.
| Molecular weight | 161.00 |
|---|---|
| Empirical formula | C4H5BrN2 |
| Assay | 97% |
| Solubility | methanol: soluble0.25 g/5mL, clear, colorless to yellowmethanol: soluble50 mg/mL, clear, colorless to yellow |
| Application | 4-Bromo-3-methyl-1H-pyrazole may be used in chemical synthesis. |
| Melting point | 77-79 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Bromo-3-methyl-1H-pyrazole used for?
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4-Bromo-3-methyl-1H-pyrazole is primarily used as an intermediate in chemical synthesis, particularly for the development of heterocyclic compounds.
What is the CAS number and molecular formula for 4-Bromo-3-methyl-1H-pyrazole?
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The CAS number is 13808-64-5 and the molecular formula is C4H5BrN2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Bromo-3-methyl-1H-pyrazole with a purity of 97%. This is a technical/research grade material and is not represented as USP, BP, EP, or other pharmacopoeial grades.
How should 4-Bromo-3-methyl-1H-pyrazole be handled safely?
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Handle with appropriate personal protective equipment, including a dust mask (N95 US type), eyeshields, and gloves. It is advised to avoid breathing dust, and to ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling instructions.
How is 4-Bromo-3-methyl-1H-pyrazole packed and shipped?
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This product is typically packed in suitable containers for chemical transport and exported globally by Tech Serve Solutions, adhering to all relevant shipping regulations.
How can I request a quote or sample for 4-Bromo-3-methyl-1H-pyrazole?
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To request a quote or a sample, please contact our sales team through the website or via email, providing your specific requirements.
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