1,4-Diethynylbenzene
1,4-Diethynylbenzene (CAS: 935-14-8) is an organic compound with the linear formula HC≡CC₆H₄C≡CH and a molecular weight of 126.15 g/mol. This difunctional alkyne serves as a valuable building block in organic synthesis. Its terminal ethynyl groups readily participate in various coupling reactions and polymerisation processes, making it useful for constructing complex molecular architectures and advanced materials.
- Synonyms
- HC≡CC6H4C≡CH

Organic Synthesis Building Block
1,4-Diethynylbenzene is employed as a key intermediate in the synthesis of diverse organic molecules. Its rigid structure and reactive alkyne functionalities allow for its incorporation into conjugated systems and supramolecular assemblies.
Materials Science Research
This compound is utilised in the development of novel polymers and advanced materials. The ethynyl groups can undergo polymerisation or cross-linking reactions to form materials with specific electronic or mechanical properties.
Coordination Chemistry
It can act as a linker in the construction of metal-organic frameworks (MOFs) or coordination polymers, where its rigidity and functional groups contribute to the overall structure and properties of the resulting materials.
| Molecular weight | 126.15 |
|---|---|
| Linear formula | HC≡CC6H4C≡CH |
| Assay | 96% |
| Storage temperature | 2-8°C |
| Melting point | 94-98 °C(lit.) |

Hazard statements
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 43-52/53 |
| Safety statements (S) | 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 1,4-Diethynylbenzene used for?
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1,4-Diethynylbenzene is primarily used as a building block in organic synthesis and in materials science research for the development of polymers and advanced materials.
What is the CAS number and formula for 1,4-Diethynylbenzene?
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The CAS number for 1,4-Diethynylbenzene is 935-14-8, and its linear formula is HC≡CC₆H₄C≡CH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,4-Diethynylbenzene with an assay of 96%. This product is supplied for research and development purposes and is not represented as USP, BP, EP, or any other pharmacopoeia grade.
How should 1,4-Diethynylbenzene be handled safely?
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1,4-Diethynylbenzene is classified as a Warning. It may cause an allergic skin reaction (H317). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, faceshields, and gloves, should be used. Store at 2-8°C.
Is 1,4-Diethynylbenzene a controlled substance?
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The provided data does not indicate that 1,4-Diethynylbenzene is a controlled substance.
How is 1,4-Diethynylbenzene packed, shipped, and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, adhering to all relevant shipping and export regulations to ensure safe and compliant delivery worldwide.
How can I request a sample or quote for 1,4-Diethynylbenzene?
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To request a sample or quote for 1,4-Diethynylbenzene, please contact our sales department through the provided contact channels on our website.
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