Description

1-Cyclopentene-1-Aceticacid,4,5,5-Trimethyl-,Ethylester(9Ci) CAS NO 656235-88-0 is a specialized cyclopentene derivative ester, valued as a versatile chemical intermediate in advanced organic synthesis. Its unique sterically hindered structure makes it a critical building block for constructing complex molecular frameworks, particularly in the development of fine chemicals and active pharmaceutical ingredients (APIs). This high-purity intermediate is essential for research and production chemists in the pharmaceutical, agrochemical, and advanced materials sectors seeking to introduce specific functional groups with precision.

Application

This compound serves as a key synthon in various high-value chemical manufacturing processes. Its primary applications include:

• Pharmaceutical Intermediate: Used in the synthesis of novel drug candidates, particularly those requiring complex, multi-ring structures.
• Agrochemical Synthesis: Acts as a precursor for developing advanced pesticides and herbicides with specific activity profiles.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, including flavors, fragrances, and performance additives.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of novel polymers and advanced organic materials.
• Academic & Industrial R&D: Utilized in methodological chemistry research for studying cycloaddition reactions and other ring-forming transformations.

Basic Information

Product Name	1-Cyclopentene-1-Aceticacid,4,5,5-Trimethyl-,Ethylester(9Ci)
CAS No.	656235-88-0
Molecular Formula	C12H20O2
Molecular Weight	196.29 g/mol
Synonyms	Ethyl 4,5,5-Trimethyl-1-cyclopentene-1-acetate; 4,5,5-Trimethyl-1-cyclopentene-1-acetic Acid Ethyl Ester; 1-Cyclopentene-1-acetic acid, 4,5,5-trimethyl-, ethyl ester; Ethyl (4,5,5-trimethylcyclopent-1-en-1-yl)acetate; 656235-88-0; (4,5,5-Trimethylcyclopent-1-en-1-yl)acetic acid ethyl ester
EINECS	Contact for details

Quality Control

Our production of 1-Cyclopentene-1-Aceticacid,4,5,5-Trimethyl-,Ethylester(9Ci) adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. All materials undergo rigorous analytical testing, including chromatography and spectroscopy, to verify identity and purity. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment. We support compliance with cGMP and ISO standards for pharmaceutical and industrial intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. The container should be kept tightly sealed when not in use to minimize exposure to atmospheric moisture and oxygen.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Purity (GC)	≥ 96.0%
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.