Description

Cyclopentene, 1-Methyl-3-Methylene-2-(1-Propynyl)- (9Ci) is a specialized, high-purity organic compound identified by CAS number 126133-18-4. This molecule is valued for its unique functionalized cyclopentene core, which serves as a versatile and reactive intermediate in advanced organic synthesis. It is primarily sought after by research and development chemists in the pharmaceutical and agrochemical sectors for constructing complex molecular architectures, as well as by manufacturers of specialty polymers and fine chemicals.

Application

• Pharmaceutical Intermediate: A key building block for synthesizing novel active pharmaceutical ingredients (APIs) and complex heterocyclic compounds.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and plant growth regulators.
• Specialty Polymer Chemistry: Serves as a monomer or cross-linking agent for developing polymers with specific thermal or mechanical properties.
• Fine Chemical Production: Employed in the manufacture of dyes, fragrances, and other high-value specialty chemicals.
• Material Science Research: Investigated for use in organic semiconductors, liquid crystals, and other advanced functional materials.
• Academic & Industrial R&D: A critical reagent for methodological development in organic synthesis and catalysis studies.

Basic Information

Item	Details
Product Name	Cyclopentene, 1-Methyl-3-Methylene-2-(1-Propynyl)- (9Ci)
CAS No.	126133-18-4
Molecular Formula	C10H12
Molecular Weight	132.20 g/mol
Synonyms	1-Methyl-3-methylene-2-(1-propynyl)cyclopentene; 2-(1-Propynyl)-1-methyl-3-methylenecyclopentene; 1-Methyl-2-prop-1-ynyl-3-methylenecyclopentene; 1-Methyl-3-methylene-2-prop-1-ynylcyclopentene; (9CI) Cyclopentene derivative; Functionalized Cyclopentene Monomer
EINECS	Contact for details

Quality Control

Every batch of Cyclopentene, 1-Methyl-3-Methylene-2-(1-Propynyl)- (9Ci) is produced and analyzed under strict quality management protocols. We provide comprehensive analytical data to ensure identity, purity, and consistency, which is critical for sensitive synthetic applications. A Certificate of Analysis (COA) detailing specifications such as assay (by GC or HPLC), identity confirmation (by IR/NMR), and impurity profiles is available for each lot upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (typically 15-25°C). This compound should be kept under an inert atmosphere if long-term stability is required and handled in accordance with safe laboratory practices for reactive organics.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC/HPLC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 0.5%
Related Substances (GC/HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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