3,3′′′-Didodecyl-2,2′:5′,2′′:5′′,2′′′−quaterthiophene
3,3′′′-Didodecyl-2,2′:5′,2′′:5′′,2′′′−quaterthiophene (CAS: 162151-09-9) is a p-type organic semiconductor with the molecular formula C40H58S4 and a molecular weight of 667.15. This semiconducting oligomer is valuable in materials science, particularly for its use as a monomer in the synthesis of poly(3,3′′′-dialkyl-quaterthiophene) polymers (PQTs). It is widely employed in the development of organic field-effect transistors and other organic electronic devices.
- IUPAC
- 5,5′-Bis(3-dodecyl-2-thienyl)-2,2′-bithiophene
- Synonyms
- 2′′:5′′,2′′′−quaterthiophene,162151-09-9, C40H58S4, 5,5′-Bis(3-dodecyl-2-thienyl)-2,2′-bithiophene

Organic Field-Effect Transistors (OFETs)
Utilised as a p-type semiconductor material, this quaterthiophene derivative is integral to the fabrication of OFETs, contributing to charge transport properties in electronic circuits.
Polymer Synthesis
Serves as a key monomer for creating poly(3,3′′′-dialkyl-quaterthiophene) (PQT) polymers. These polymers are often investigated for their semiconducting characteristics.
Organic Electronics
Its semiconducting nature makes it a relevant material for research and development in printed electronics and other advanced organic electronic applications.
Materials Science Research
A versatile building block for exploring novel organic materials with tailored electronic and optical properties, supporting advancements in materials science.
| Molecular weight | 667.15 |
|---|---|
| Empirical formula | C40H58S4 |
| Assay | 97% |
| Application | Semiconducting oligomer (p-type), also used as monomer to prepare poly(3,3′′′-dialkyl-quaterthiophene) polymers (PQTs).1 |
| Melting point | 55-59 °C |

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 |
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′′′-Didodecyl-2,2′:5′,2′′:5′′,2′′′−quaterthiophene primarily used for?
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This compound is primarily used as a p-type semiconducting oligomer and as a monomer for synthesizing poly(3,3′′′-dialkyl-quaterthiophene) polymers, finding applications in organic field-effect transistors and organic electronics.
What is the CAS number and molecular formula for 3,3′′′-Didodecyl-2,2′:5′,2′′:5′′,2′′′−quaterthiophene?
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The CAS number is 162151-09-9, and its molecular formula is C40H58S4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with a minimum assay of 97%. It is typically supplied as a technical or research grade material and is not represented as USP, BP, or EP grade.
How should 3,3′′′-Didodecyl-2,2′:5′,2′′:5′′,2′′′−quaterthiophene be handled safely?
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This compound is a Warning substance, causing skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves. Ensure adequate ventilation and avoid breathing dust.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions packs and ships chemicals according to international standards and regulations. As a global supplier, we are experienced in exporting fine chemicals worldwide.
How can I request a sample or a quote for this product?
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To request a sample or obtain a quote, please contact our sales team via the website or direct email, providing the product name and CAS number (162151-09-9).
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