2-Ethynyltoluene
2-Ethynyltoluene (CAS 766-47-2), with the molecular formula CH₃C₆H₄C≡CH and a molecular weight of 116.16 g/mol, is a terminal alkyne. This organic compound serves as a valuable building block in chemical synthesis. Its structure, featuring a methyl-substituted phenyl ring attached to an ethynyl group, allows for diverse reactions, making it useful in the development of more complex organic molecules and intermediates within research and industrial settings.

Organic Synthesis Intermediate
2-Ethynyltoluene acts as a versatile intermediate in the synthesis of various organic compounds. Its terminal alkyne functionality is amenable to a wide range of coupling reactions, cycloadditions, and functional group transformations.
Building Block for Complex Molecules
This compound is employed as a key building block in the construction of more intricate molecular architectures. It is particularly useful in academic and industrial research laboratories for developing novel materials and pharmaceutical precursors.
Research and Development
Utilised in R&D settings, 2-Ethynyltoluene enables chemists to explore new synthetic pathways and create novel chemical entities. Its specific reactivity profile makes it a useful tool for probing reaction mechanisms and developing new synthetic methodologies.
| Molecular weight | 116.16 |
|---|---|
| Linear formula | CH3C6H4C≡CH |
| Assay | 97% |
| Boiling point | 50-60 °C/30 mmHg(lit.) |
| Density | 0.922 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5470(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- 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 | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 35 °C / 95 °F |
| Transport (UN / ADR) | UN 3295C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| Safety statements (S) | 16-26-36 |
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 2-Ethynyltoluene used for?
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2-Ethynyltoluene is primarily used as a building block and intermediate in organic synthesis and for research and development purposes in academic and industrial laboratories.
What is the CAS number and chemical formula for 2-Ethynyltoluene?
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The CAS number for 2-Ethynyltoluene is 766-47-2, and its linear formula is CH₃C₆H₄C≡CH.
What grade and purity does Tech Serve Solutions supply for 2-Ethynyltoluene?
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Tech Serve Solutions supplies 2-Ethynyltoluene with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should 2-Ethynyltoluene be handled safely?
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2-Ethynyltoluene is a flammable liquid and vapour (H226) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including eyeshields, gloves, and ensure adequate ventilation. Avoid sources of ignition.
How is 2-Ethynyltoluene packed and exported?
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2-Ethynyltoluene is packed according to transport regulations, including UN 3295C 3 / PGIII. Tech Serve Solutions exports globally, adhering to all relevant shipping and customs requirements.
How can I request a quote or sample of 2-Ethynyltoluene?
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To request a quote or sample of 2-Ethynyltoluene, please contact our sales department via the website or listed contact information, specifying your requirements.
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