Description

Cyclopropanecarboxylic Acid, 1-Methyl-2-Methylene-, Ethyl Ester (9Ci) is a specialized organic ester building block featuring a reactive methylenecyclopropane moiety. This compound matters for its unique structural framework, which is highly valuable in advanced organic synthesis and pharmaceutical research for constructing complex molecular architectures. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries for applications such as cyclopropanation reactions and the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of novel active pharmaceutical ingredients (APIs), particularly those requiring cyclopropane rings.
• Agrochemical Synthesis: Used in the creation of advanced pesticide and herbicide candidates, leveraging its reactive structure for bioactivity.
• Fine Chemical Production: Serves as a versatile building block for synthesizing complex fragrance compounds, flavors, and specialty materials.
• Academic & Industrial R&D: Employed in methodological studies and process chemistry for cyclopropanation and ring-opening polymerization reactions.
• Material Science Precursor: Investigated for the development of novel polymers and functional materials with unique thermal or mechanical properties.

Basic Information

Product Name	Cyclopropanecarboxylic Acid, 1-Methyl-2-Methylene-, Ethyl Ester (9Ci)
CAS No.	55281-55-5
Molecular Formula	C8H12O2
Molecular Weight	140.18 g/mol
Synonyms	Ethyl 1-Methyl-2-methylenecyclopropanecarboxylate; 1-Methyl-2-methylenecyclopropanecarboxylic Acid Ethyl Ester; 2-Methylene-1-methylcyclopropanecarboxylic acid ethyl ester; Ethyl (1-methyl-2-methylenecyclopropyl)carboxylate; Methylenecyclopropane derivative; Cyclopropanecarboxylic acid ethyl ester derivative
EINECS	Contact for details

Quality Control

Our production of Cyclopropanecarboxylic Acid, 1-Methyl-2-Methylene-, Ethyl Ester (9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity for research and industrial use. While typically supplied as a technical or research grade, specifications can be tailored to meet specific project requirements. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (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
Purity (GC)	≥ 95% (Typical 97-99%)
Water Content (KF)	≤ 0.5%

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