Description

Cyclopentanecarboxylic Acid, 2-Ethylidene-, Methyl Ester, (E)- (9Ci) is a specialized organic ester compound with a defined stereochemistry, serving as a valuable intermediate in advanced chemical synthesis. Its precise molecular structure, identified by CAS number 172981-48-5, makes it a critical building block for creating complex molecules in research and industrial applications. This high-purity intermediate is essential for pharmaceutical development, agrochemical research, and the synthesis of fine chemicals where specific stereochemistry and functional groups are required.

Application

• Pharmaceutical Intermediate: A key chiral synthon in the research and development of active pharmaceutical ingredients (APIs), particularly for compounds requiring a functionalized cyclopentane core.
• Agrochemical Synthesis: Used in the production of advanced pesticides and herbicides, where its specific ester and alkene functionality can be leveraged for targeted biological activity.
• Fine Chemical Manufacturing: Serves as a versatile precursor for synthesizing flavors, fragrances, and other specialty organic compounds.
• Material Science Research: Employed in the development of novel polymers and advanced materials, utilizing its reactive sites for polymerization or functionalization.
• Academic & Industrial R&D: A valuable reagent for methodological development in organic chemistry, including studies on stereoselective synthesis and catalysis.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 2-Ethylidene-, Methyl Ester, (E)- (9Ci)
CAS No.	172981-48-5
Molecular Formula	C9H14O2
Molecular Weight	154.21 g/mol
Synonyms	(E)-2-Ethylidenecyclopentanecarboxylic acid methyl ester; Methyl (E)-2-ethylidenecyclopentanecarboxylate; 2-Ethylidenecyclopentanecarboxylic Acid Methyl Ester; (E)-Methyl 2-ethylidene-1-cyclopentanecarboxylate; trans-2-Ethylidenecyclopentanecarboxylic acid methyl ester; Cyclopentanecarboxylic acid, 2-ethylidene-, methyl ester, (E)-; 172981-48-5
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 2-Ethylidene-, Methyl Ester, (E)- (9Ci) is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity suitable for sensitive synthetic applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, stereochemical purity, and impurity profiles. Our quality management system is designed to meet the stringent requirements of GMP and ISO standards for intermediate chemicals.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Isomeric Purity (E-isomer)	≥ 98.0%
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.