Description

Cyclopentanecarboxylic Acid, 2-Methylene-, Methyl Ester (9Ci) is a specialized organic ester building block characterized by its reactive methylene group adjacent to the carbonyl. This compound matters as a versatile synthon in advanced organic synthesis, enabling the construction of complex cyclic frameworks and functionalized intermediates. It is primarily needed by R&D chemists and process development teams in the pharmaceutical, agrochemical, and fine chemical industries for applications such as medicinal chemistry and material science. CAS No. 110550-98-6.

Application

• As a key pharmaceutical intermediate in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• Utilized in agrochemical research for the development of new herbicides, fungicides, and plant growth regulators.
• Serves as a building block in organic synthesis for constructing complex carbocyclic and heterocyclic compounds.
• Used in material science for the preparation of specialized polymers and advanced organic materials.
• Acts as a precursor in flavor and fragrance chemistry for creating unique ester-based aroma molecules.
• Employed in academic and industrial R&D for methodological studies in organic chemistry and catalysis.

Basic Information

Product Name	Cyclopentanecarboxylic Acid, 2-Methylene-, Methyl Ester (9Ci)
CAS No.	110550-98-6
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	2-Methylenecyclopentanecarboxylic Acid Methyl Ester; Methyl 2-Methylenecyclopentanecarboxylate; 2-Methylenecyclopentane-1-carboxylic Acid Methyl Ester; Cyclopentanecarboxylic Acid, 2-Methylene-, Methyl Ester; Methyl 2-Methyleneclyclopentanecarboxylate; 2-Methyleneclyclopentanecarboxylic Acid Methyl Ester
EINECS	Contact for details

Quality Control

Our Cyclopentanecarboxylic Acid, 2-Methylene-, Methyl Ester (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for research and process chemistry. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider maintaining under an inert atmosphere to preserve stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC/HPLC)	Individual impurity ≤ 1.0%

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