Description

3-Methylidenecyclopentene is a highly reactive, low molecular weight cyclic diene with a strained double-bond system. This unique structure makes it a valuable and versatile chemical intermediate for synthesizing complex organic frameworks. It is primarily sought after by R&D chemists and process engineers in the pharmaceutical and advanced materials sectors for building specialized molecular architectures.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for creating constrained ring systems.
• Organic Synthesis Reagent: Used in Diels-Alder reactions and other cycloadditions to construct complex polycyclic compounds in academic and industrial research.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, including fragrances, agrochemicals, and performance materials.
• Polymer & Material Science: Acts as a monomer or cross-linking agent in the development of specialty polymers with tailored thermal or mechanical properties.
• Catalysis Research: Utilized as a ligand precursor or substrate in the development and testing of new metal-organic catalysts.

Basic Information

Product Name	3-Methylidenecyclopentene
CAS No.	930-26-7
Molecular Formula	C6H8
Molecular Weight	80.13 g/mol
Synonyms	3-Methylenecyclopentene; Cyclopentene, 3-methylene-; 3-Methylen-cyclopenten; 1-Methylidene-2-cyclopentene; NSC 66466
EINECS	213-219-8

Quality Control

Our 3-Methylidenecyclopentene is produced and handled under strict quality management protocols. Each batch undergoes rigorous analytical testing, including GC and NMR analysis, to ensure high purity and identity confirmation. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your research or production standards.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C to minimize volatility and degradation. Keep away from heat, sparks, and open flames.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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