1-Chloro-4-(phenylethynyl)benzene
1-Chloro-4-(phenylethynyl)benzene (CAS: 5172-02-1) is an organic compound with the formula ClC6H4C≡CC6H5 and a molecular weight of 212.67 g/mol. This halogenated hydrocarbon serves as a valuable building block in organic synthesis. Its structure, featuring a chlorinated phenyl ring linked to a phenylethynyl group, makes it useful for introducing specific functionalities in the development of complex organic molecules and advanced materials.

Organic Synthesis Intermediate
As a versatile building block, 1-Chloro-4-(phenylethynyl)benzene is employed in various organic synthesis pathways. It can participate in coupling reactions and functional group transformations to construct more complex molecular architectures.
Materials Science Research
This compound's unique structure makes it a candidate for research in materials science, potentially contributing to the development of novel organic electronic or polymeric materials through its incorporation into larger structures.
Pharmaceutical and Agrochemical Development
It may serve as a key intermediate in the synthesis of active pharmaceutical ingredients (APIs) or agrochemicals, where the specific arrangement of aromatic rings and the halogen substituent is crucial for biological activity.
| Molecular weight | 212.67 |
|---|---|
| Linear formula | ClC6H4C≡CC6H5 |
| Assay | 98% |
| Melting point | 81-83 °C(lit.) |

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) | 26-36 |
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 1-Chloro-4-(phenylethynyl)benzene used for?
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1-Chloro-4-(phenylethynyl)benzene is primarily used as a building block in organic synthesis and for research in materials science and potentially in the development of pharmaceuticals and agrochemicals.
What is the CAS number and chemical formula for 1-Chloro-4-(phenylethynyl)benzene?
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The CAS number is 5172-02-1 and the chemical formula is ClC6H4C≡CC6H5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Chloro-4-(phenylethynyl)benzene with a minimum purity of 98%. This is a technical/research grade material, and TSS does not represent it as USP, BP, or EP grade.
How should 1-Chloro-4-(phenylethynyl)benzene be handled safely?
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Handling requires appropriate personal protective equipment including a dust mask type N95 (US), eyeshields, and gloves. It is classified as a Warning with hazard statements H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Ensure good ventilation.
How is 1-Chloro-4-(phenylethynyl)benzene packed, shipped, and exported?
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1-Chloro-4-(phenylethynyl)benzene is carefully packed according to industry standards for chemical handling and is available for global export by Tech Serve Solutions.
How can I request a sample or quote for 1-Chloro-4-(phenylethynyl)benzene?
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To request a sample or a quote, please contact the Tech Serve Solutions sales team through our website or by phone, providing your specific requirements.
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