Description

2-Cyclobutene-1-Carboxylic Acid, 1-Methyl-, Methyl Ester (9Ci) is a specialized organic ester building block of significant interest in advanced synthetic chemistry. Its unique strained cyclobutene ring system makes it a valuable precursor for constructing complex molecular architectures, particularly in pharmaceutical and agrochemical research. This compound is primarily sought after by R&D chemists and process development scientists working on novel active ingredients, fine chemicals, and material science applications where its specific reactivity profile is essential.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of novel drug candidates, particularly those requiring strained ring systems.
• Agrochemical Synthesis: Used as a building block for creating advanced pesticides, herbicides, and fungicides with novel modes of action.
• Fine Chemical Production: Serves as a precursor in the synthesis of complex flavors, fragrances, and specialty performance chemicals.
• Material Science Research: Investigated as a monomer or cross-linking agent for developing polymers with unique thermal or mechanical properties.
• Academic & Industrial R&D: Employed in methodological studies and catalysis research involving ring-opening or functionalization reactions.

Basic Information

Product Name	2-Cyclobutene-1-Carboxylic Acid, 1-Methyl-, Methyl Ester (9Ci)
CAS No.	131179-07-2
Molecular Formula	C7H10O2
Molecular Weight	126.15 g/mol
Synonyms	Methyl 1-Methyl-2-cyclobutene-1-carboxylate; 1-Methyl-2-cyclobutene-1-carboxylic Acid Methyl Ester; Methyl 1-Methylcyclobut-2-ene-1-carboxylate; 2-Cyclobutene-1-carboxylic acid, 1-methyl-, methyl ester; 1-Methylcyclobut-2-ene-1-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Every batch of 2-Cyclobutene-1-Carboxylic Acid, 1-Methyl-, Methyl Ester (9Ci) is produced and tested under strict quality management protocols to ensure consistency and purity for research and development applications. Our products undergo rigorous analytical testing, including chromatography and spectroscopy, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance processes.

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 8°C (refrigerated) for long-term stability. Allow the container to reach ambient temperature before opening to prevent moisture condensation. Keep away from heat, sparks, and open flame.

Specification

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

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