3-Cyclopentyl-1-propyne
3-Cyclopentyl-1-propyne (CAS: 116279-08-4), with the molecular formula C8H12 and a molecular weight of 108.18 g/mol, is a terminal alkyne. This organic compound serves as a valuable building block in chemical synthesis. Its specific structure, featuring a cyclopentyl group attached to a propyne moiety, makes it suitable for constructing more complex molecules in research and development settings, particularly within organic chemistry and materials science.

Organic Synthesis Intermediate
3-Cyclopentyl-1-propyne functions as a key intermediate in the synthesis of complex organic molecules. Its terminal alkyne group readily participates in various coupling reactions and cycloadditions, enabling the formation of diverse carbon frameworks.
Building Block for Specialty Chemicals
This compound is employed as a building block for creating specialty chemicals and novel materials. The incorporation of the cyclopentyl ring and alkyne functionality allows for tailored molecular design in advanced research applications.
Research and Development
Utilised in R&D laboratories, 3-Cyclopentyl-1-propyne supports the exploration of new chemical pathways and the development of innovative compounds. Its reactivity profile is advantageous for academic and industrial research chemists.
| Molecular weight | 108.18 |
|---|---|
| Empirical formula | C8H12 |
| Assay | 97% |
| Boiling point | 132-134 °C(lit.) |
| Density | 0.827 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.4490(lit.) |



Hazard statements
- H225Highly flammable liquid and vapour
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P280Wear protective gloves, clothing and eye/face protection
- 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 | 21 °C / 69.8 °F |
| Transport (UN / ADR) | UN 1993BE 3 / PGII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-22-41 |
| Safety statements (S) | 16-26-36/39 |
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 3-Cyclopentyl-1-propyne used for?
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3-Cyclopentyl-1-propyne is primarily used as an intermediate in organic synthesis and as a building block for specialty chemicals and novel materials in research and development.
What is the CAS number and molecular formula for 3-Cyclopentyl-1-propyne?
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The CAS number for 3-Cyclopentyl-1-propyne is 116279-08-4, and its molecular formula is C8H12.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Cyclopentyl-1-propyne with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
What are the primary safety hazards associated with 3-Cyclopentyl-1-propyne?
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3-Cyclopentyl-1-propyne is flammable (H225) and harmful if swallowed (H302), and causes serious eye damage (H318). It requires appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, and should be handled away from ignition sources.
How is 3-Cyclopentyl-1-propyne packed and shipped?
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Tech Serve Solutions exports chemicals globally, adhering to strict safety and regulatory standards for packing and transportation. Specific packaging details are provided upon order confirmation.
How can I request a quote or sample for 3-Cyclopentyl-1-propyne?
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To request a quote or sample, please contact our sales department through the website or by phone. Provide the product name and CAS number for efficient processing.
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