4-Bromo-3-methyl-5-phenyl-1H-pyrazole
4-Bromo-3-methyl-5-phenyl-1H-pyrazole (CAS: 13808-66-7) is a halogenated heterocyclic building block with the molecular formula C10H9BrN2 and a molecular weight of 237.10 g/mol. Supplied at 97% purity, this compound is primarily utilised in chemical synthesis as a key intermediate for the development of novel molecules and materials within research and development settings.
- IUPAC
- 4-Bromo-3-methyl-5-phenylpyrazole

Organic Synthesis Intermediate
Serves as a versatile building block in multi-step organic synthesis pathways. Its bromo- and pyrazole functionalities allow for diverse chemical transformations, enabling the construction of more complex molecular architectures.
Heterocyclic Chemistry Research
Used in the exploration of pyrazole derivatives, a class of compounds known for their wide-ranging biological activities and material properties. Facilitates the investigation of structure-activity relationships in drug discovery and materials science.
Pharmaceutical Intermediate Development
A valuable precursor in the synthesis of potential pharmaceutical agents. The specific arrangement of substituents on the pyrazole ring can be leveraged to design molecules with targeted therapeutic effects.
| Molecular weight | 237.10 |
|---|---|
| Empirical formula | C10H9BrN2 |
| Assay | 97% |
| Melting point | 87-92 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26-36/37/39 |
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-5-phenyl-1H-pyrazole used for?
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4-Bromo-3-methyl-5-phenyl-1H-pyrazole (CAS: 13808-66-7) is primarily used as a building block in organic synthesis, particularly within heterocyclic chemistry and for the development of pharmaceutical intermediates and novel materials.
What are the CAS number and formula for 4-Bromo-3-methyl-5-phenyl-1H-pyrazole?
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The CAS number for 4-Bromo-3-methyl-5-phenyl-1H-pyrazole is 13808-66-7, and its empirical formula is C10H9BrN2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Bromo-3-methyl-5-phenyl-1H-pyrazole with an assay of 97%. This is a research-grade chemical and is not represented as USP, BP, EP, or any other pharmacopoeial grade.
How should I handle 4-Bromo-3-methyl-5-phenyl-1H-pyrazole?
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Handle with care. This compound is a Warning substance, classified with hazards H302 (Harmful if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Wear appropriate personal protective equipment, including gloves, eye protection, and ensure adequate ventilation or use in a fume hood. Avoid breathing dust/fume/gas/mist/vapours/spray. In case of contact with eyes, rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
How is this chemical packed and exported?
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Products are securely packed according to international shipping regulations. Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents.
How can I request a quote or sample?
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Please contact our sales team via the website or directly to request a quotation or a sample of 4-Bromo-3-methyl-5-phenyl-1H-pyrazole.
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