3,3′,5,5′-Tetrabromo-2,2′-bithiophene
3,3′,5,5′-Tetrabromo-2,2′-bithiophene (CAS: 125143-53-5), with the molecular formula C8H2Br4S2, is a brominated bithiophene derivative. This compound is primarily utilised as a building block and reagent in organic synthesis, particularly within materials science and organic electronics research. Its structure makes it valuable for creating novel conjugated polymers and functional materials.
- Synonyms
- 5′-Tetrabromo-2,2′-bithiophene, 125143-53-5, C8H2Br4S2

Organic Electronics Research
Serves as a precursor for synthesising novel organic semiconductors and conducting polymers. Its tetrabrominated structure allows for controlled polymerisation and functionalisation in the development of advanced electronic materials.
Materials Science
Used as a monomer or intermediate in the creation of specialised materials with tailored electronic or optical properties. It contributes to the development of functional organic molecules for various applications.
Synthetic Reagent
Acts as a versatile building block in organic chemistry for introducing brominated bithiophene units into more complex molecular architectures. Facilitates cross-coupling reactions for constructing conjugated systems.
| Molecular weight | 481.85 |
|---|---|
| Empirical formula | C8H2Br4S2 |
| Assay | 97% |
| Melting point | 138-143 °C |

Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 41 |
| Safety statements (S) | 26-36 |
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 3,3′,5,5′-Tetrabromo-2,2′-bithiophene used for?
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This compound is primarily used as a building block in organic synthesis, particularly for creating novel materials in organic electronics and materials science research. It serves as a precursor for conjugated polymers and functional organic molecules.
What is the CAS number and formula for 3,3′,5,5′-Tetrabromo-2,2′-bithiophene?
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The CAS number is 125143-53-5, and the empirical formula is C8H2Br4S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 97%. This is a research or technical grade material and is not represented as USP, BP, or EP grade.
How should 3,3′,5,5′-Tetrabromo-2,2′-bithiophene be handled?
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This compound causes serious eye damage (H318). Wear eye protection (P280, P305 + P351 + P338). In case of contact with eyes, rinse cautiously with water for several minutes; remove contact lenses if present and easy to do. Continue rinsing.
Is this chemical suitable for export or international shipment?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, and this product can be exported. Please contact us for specific shipping details and documentation.
How can I request a sample or quote?
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To request a sample or a quote, please use the 'Request a Quote' or 'Sample Request' form on our website, or contact our sales team directly with your requirements.
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