Description

Cyclopentanecarboxylic Acid, 3-Methylene-, Methyl Ester (9Ci) is a specialized organic ester building block with a unique bicyclic structure. This compound is valued for its reactive methylene group and ester functionality, making it a versatile intermediate in advanced organic synthesis. It is primarily sought after by research and development chemists in the pharmaceutical and agrochemical industries for constructing complex molecular architectures. The product is supplied with a CAS number of 37575-80-7.

Application

This chemical serves as a key synthetic intermediate in several high-value industrial and research domains:

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those containing complex carbocyclic or heterocyclic ring systems.
• Agrochemical Synthesis: Acts as a precursor for developing novel herbicides, fungicides, and insecticides with specific activity profiles.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, including fragrances, flavors, and advanced materials.
• Academic & Industrial R&D: A valuable reagent for methodological development in organic chemistry, including cycloaddition and ring-opening reactions.
• Polymer Chemistry: Can be utilized as a monomer or co-monomer for creating polymers with specific thermal or mechanical properties.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 3-Methylene-, Methyl Ester (9Ci)
CAS No.	37575-80-7
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	3-Methylenecyclopentanecarboxylic acid methyl ester; Methyl 3-methylenecyclopentanecarboxylate; 3-Methylenecyclopentane-1-carboxylic acid methyl ester; Cyclopentanecarboxylic acid, 3-methylene-, methyl ester; 37575-80-7; Methyl 3-methylidenecyclopentane-1-carboxylate
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 3-Methylene-, Methyl Ester (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatography (GC/HPLC) and spectroscopic methods (NMR, IR), to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, confirming it meets the agreed specifications for research and industrial use.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Recommended storage temperature is between 2°C and 25°C. Keep away from heat, sparks, and open flames. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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