2,3-Dibromo-4-methylthiophene
2,3-Dibromo-4-methylthiophene (CAS: 125257-38-7) is a halogenated heterocyclic building block with the molecular formula C5H4Br2S and a molecular weight of 255.96 g/mol. This compound is primarily utilised in chemical synthesis as an intermediate for the creation of more complex organic molecules. Its specific substitution pattern makes it a valuable reagent in research and development laboratories focusing on novel material science and pharmaceutical applications.
- Synonyms
- C5H4Br2S2,3-Dibromo-4-methyl-1-thiophen2,3-dibromo-4-methylthiophen

Organic Synthesis Intermediate
Serves as a key building block in multi-step organic synthesis pathways. Its dibrominated thiophene core allows for diverse functionalisation through cross-coupling reactions or nucleophilic substitutions.
Pharmaceutical Research
Employed in the synthesis of novel pharmaceutical candidates and drug discovery programs. The thiophene moiety is a common scaffold in various biologically active compounds.
Material Science
Investigated for its potential incorporation into functional organic materials, such as organic semiconductors or conductive polymers, owing to its heterocyclic structure.
| Molecular weight | 255.96 |
|---|---|
| Empirical formula | C5H4Br2S |
| Assay | 97% |
| Density | 1.984 g/mL at 25 °C |
| Storage temperature | 2-8°C |


Hazard statements
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | >110 °C / >230 °F |
| Transport (UN / ADR) | UN 2810 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-41 |
| 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 2,3-Dibromo-4-methylthiophene used for?
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2,3-Dibromo-4-methylthiophene (CAS: 125257-38-7) is primarily used as a building block in organic synthesis for creating more complex molecules, particularly in pharmaceutical research and material science.
What is the CAS number and chemical formula for 2,3-Dibromo-4-methylthiophene?
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The CAS number is 125257-38-7 and the chemical formula is C5H4Br2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,3-Dibromo-4-methylthiophene with a purity of 97%. This product is supplied for research and laboratory use and is not represented as USP, BP, EP, or any other pharmacopoeia grade.
How should 2,3-Dibromo-4-methylthiophene be handled safely?
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Danger: Harmful if swallowed and causes serious eye damage. Wear eyeshields, gloves, and a dust mask type N95 (US). Ensure proper ventilation. Handle in accordance with the provided hazard statements (H302-H318) and precautionary statements (P280, P305+P351+P338).
How is 2,3-Dibromo-4-methylthiophene packed and shipped?
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The product is packed in compliance with transport regulations (UN 2810 6.1 / PGIII). Tech Serve Solutions exports fine chemicals globally, ensuring adherence to all relevant shipping and customs requirements.
How can I request a quote or sample for 2,3-Dibromo-4-methylthiophene?
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To request a quote or a sample, please contact the Tech Serve Solutions sales team through our website or by calling us directly. Please reference the product name and CAS number (125257-38-7).
Does 2,3-Dibromo-4-methylthiophene require special storage conditions?
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Yes, 2,3-Dibromo-4-methylthiophene should be stored at a temperature of 2-8°C to maintain its stability and quality.
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