Description

Cyclopentene CAS NO 142-29-0 is a versatile five-membered cyclic olefin characterized by its high reactivity and volatility. This compound serves as a crucial building block and reactive intermediate in advanced organic synthesis and polymer chemistry. It is primarily utilized by R&D laboratories and industrial manufacturers in the pharmaceutical, agrochemical, and specialty polymer sectors for applications requiring a strained, reactive alkene functionality.

Application

• Organic Synthesis Intermediate: A key precursor in the synthesis of cyclopentane derivatives, prostaglandins, and other complex organic molecules.
• Polymer & Copolymer Production: Used in ring-opening metathesis polymerization (ROMP) and as a comonomer to modify polymer properties like flexibility and glass transition temperature.
• Pharmaceutical Research: Employed as a building block for active pharmaceutical ingredients (APIs) and in medicinal chemistry research.
• Agrochemical Manufacturing: Acts as an intermediate in the synthesis of certain pesticides and herbicides.
• Flavor & Fragrance Industry: Serves as a starting material for the synthesis of specific aroma chemicals.
• Chemical Crosslinking Agent: Utilized in the production of crosslinked polymers and resins.
• Catalyst & Ligand Research: Used in organometallic chemistry and the development of new catalytic systems.
• Laboratory Reagent: A standard reagent for studying alkene reactivity, Diels-Alder reactions, and other fundamental chemical transformations.

Basic Information

Product Name	Cyclopentene
CAS No.	142-29-0
Molecular Formula	C5H8
Molecular Weight	68.12 g/mol
Synonyms	Cyclopentene; 1-Cyclopentene; Pent-1-ene-1,5-diyl; UN 2246; Cyclopenten; Cyclopent-1-ene; 3-Cyclopentene (obsolete); Cyclopentylene
EINECS	205-532-9

Quality Control

Our Cyclopentene is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC), to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee compliance with your research and production specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flames. Due to its highly volatile nature, containers must be kept tightly sealed and under an inert atmosphere (e.g., nitrogen) when not in use to prevent evaporation and polymerization. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Clear, colorless liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20/D)	1.4220 - 1.4240
Density (20°C)	0.772 - 0.776 g/mL
Boiling Point	44 - 46 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.