3-Cyclopentylpropionic acid
3-Cyclopentylpropionic acid (CAS: 140-77-2), with the chemical formula C5H9CH2CH2CO2H, is a carboxylic acid with a molecular weight of 142.20 g/mol. This organic compound is valuable as a chemical building block in synthesis. It is commonly employed in organic synthesis and research laboratories for the construction of more complex molecular structures.
- IUPAC
- Cyclopentanepropionic acid
- Synonyms
- Cyclopentanepropionic acid

Organic Synthesis
Serves as a versatile intermediate in the synthesis of various organic compounds, enabling the formation of new carbon-carbon bonds and functional group transformations.
Chemical Research
Utilised in research and development settings for exploring novel chemical reactions and developing new materials or pharmaceutical candidates.
Building Block
Acts as a foundational molecule in multi-step synthetic pathways, contributing its cyclopentyl and propionic acid functionalities to target structures.
| Molecular weight | 142.20 |
|---|---|
| Linear formula | C5H9CH2CH2CO2H |
| Assay | 98% |
| Boiling point | 130-132 °C/12 mmHg(lit.) |
| Density | 0.996 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.457(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 | 47 °C / 116.6 °F |
| Transport (UN / ADR) | UN 1993C 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 3-Cyclopentylpropionic acid used for?
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3-Cyclopentylpropionic acid is primarily used as a building block in organic synthesis and in chemical research for creating more complex molecules.
What are the CAS number and chemical formula for 3-Cyclopentylpropionic acid?
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The CAS number is 140-77-2 and the chemical formula is C5H9CH2CH2CO2H.
What grade and purity does Tech Serve Solutions supply for 3-Cyclopentylpropionic acid?
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Tech Serve Solutions supplies 3-Cyclopentylpropionic acid with a purity of 98%. This product is typically supplied for research and industrial use and is not represented as USP, BP, or EP grade.
How should 3-Cyclopentylpropionic acid be handled safely?
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3-Cyclopentylpropionic acid is a flammable liquid and vapour (H226), causes skin irritation (H315), and serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment including eyeshields, gloves, and respiratory protection in a well-ventilated area.
Is 3-Cyclopentylpropionic acid exported by Tech Serve Solutions?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 3-Cyclopentylpropionic acid.
How can I request a sample or quote for 3-Cyclopentylpropionic acid?
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Please contact our sales team directly via phone or email to request a sample or a formal quotation for 3-Cyclopentylpropionic acid.
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