Description

1-Cyclobutene-1-Carboxylic Acid, 4-Hydroxy-, Methyl Ester (9Ci) is a specialized organic compound featuring a cyclobutene ring system, which serves as a valuable synthetic intermediate in advanced organic chemistry. Its unique structure, combining a carboxylic acid ester with a hydroxyl group on a strained ring, makes it a versatile building block for constructing complex molecular architectures. This compound is primarily utilized by research chemists and process development scientists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those requiring strained ring systems or specific stereochemistry.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its reactive functional groups for structural diversification.
• Fine Chemical Synthesis: Serves as a specialized building block for creating complex molecules used in material science, dyes, and fragrances.
• Academic & R&D: Employed in university and corporate research laboratories for methodological studies in organic synthesis and catalysis.
• Chemical Biology Probes: Potential use in constructing molecular probes for studying biological pathways and enzyme mechanisms.

Basic Information

Product Name	1-Cyclobutene-1-Carboxylic Acid, 4-Hydroxy-, Methyl Ester (9Ci)
CAS No.	328239-95-8
Molecular Formula	C7H10O3
Molecular Weight	142.15 g/mol
Synonyms	Methyl 4-hydroxy-1-cyclobutene-1-carboxylate; 4-Hydroxy-1-cyclobutene-1-carboxylic acid methyl ester; Methyl 4-hydroxycyclobut-1-ene-1-carboxylate; 1-Cyclobutene-1-carboxylic acid, 4-hydroxy-, methyl ester; (9CI)
EINECS	Contact for details

Quality Control

Our production of 1-Cyclobutene-1-Carboxylic Acid, 4-Hydroxy-, Methyl Ester (9Ci) adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatographic purity analysis and structural confirmation, to ensure consistency and reliability for research and development applications. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key specifications such as assay and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). This compound may be sensitive to moisture and prolonged exposure to air; it is recommended to handle and store under an inert atmosphere for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (GC)	≥ 97.0%
Water Content	≤ 0.5%

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