Description

1-Cyclopentene-1-Carboxylic Acid, 3-Hydroxy-5-Oxo-, Methyl Ester (9Ci) is a specialized, high-purity chemical intermediate with a complex cyclic structure, offering a versatile reactive scaffold for advanced synthesis. This compound is valued for its role in constructing complex molecular architectures, particularly in the development of novel active pharmaceutical ingredients (APIs) and fine chemicals. It serves as a critical building block for researchers and process chemists in pharmaceutical R&D, agrochemical development, and advanced material science.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug molecules, particularly those with cyclic or fused-ring systems.
• Agrochemical Synthesis: Used in the research and development of novel herbicides, fungicides, and plant growth regulators.
• Fine Chemical Production: Serves as a versatile building block for creating specialty chemicals, flavors, and fragrances.
• Academic & Industrial Research: A valuable reagent for methodological studies in organic chemistry, including cyclization and functional group transformation reactions.
• Material Science Precursor: Potential use in the synthesis of monomers for specialized polymers or advanced organic materials.

Basic Information

Product Name	1-Cyclopentene-1-Carboxylic Acid, 3-Hydroxy-5-Oxo-, Methyl Ester (9Ci)
CAS No.	606489-69-4
Molecular Formula	C8H10O4
Molecular Weight	170.16 g/mol
Synonyms	Methyl 3-hydroxy-5-oxo-1-cyclopentene-1-carboxylate; 3-Hydroxy-5-oxo-1-cyclopentene-1-carboxylic acid methyl ester; 1-Cyclopentene-1-carboxylic acid, 3-hydroxy-5-oxo-, methyl ester; Methyl 3-hydroxy-5-oxocyclopent-1-enecarboxylate
EINECS	Contact for details

Quality Control

Our production of 1-Cyclopentene-1-Carboxylic Acid, 3-Hydroxy-5-Oxo-, Methyl Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is characterized using advanced analytical techniques including HPLC, GC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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). Keep the container tightly sealed to protect from moisture. Store away from incompatible materials such as strong oxidizing agents, strong bases, and strong acids.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
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.