Description

Acetaldehyde, [2-Methyl-5-(1-Methylethyl)cyclopentylidene]-, (1E,2Alpha,5Alpha)- (9Ci) is a specialized, high-purity organic compound identified by CAS number 189040-37-7. This chemical serves as a valuable chiral building block and intermediate in advanced organic synthesis, prized for its defined stereochemistry and functional group reactivity. It is primarily utilized by research institutions and industrial R&D departments in the pharmaceutical, agrochemical, and fragrance sectors for developing novel active ingredients and complex molecules.

Application

This compound's unique structure makes it a versatile intermediate for sophisticated chemical synthesis. Key application areas include:

• Pharmaceutical Intermediate: Serves as a chiral synthon in the research and development of new active pharmaceutical ingredients (APIs), particularly for stereoselective synthesis.
• Agrochemical Synthesis: Used in creating advanced intermediates for novel pesticides, herbicides, and plant growth regulators with specific stereochemical requirements.
• Fragrance & Flavor Chemistry: Acts as a precursor for synthesizing complex terpenoid and sesquiterpenoid aroma molecules, contributing to unique olfactory profiles.
• Organic Synthesis Research: Employed in academic and industrial laboratories as a key reagent for methodological development in cyclopentane and cyclopentanone chemistry.
• Fine Chemical Production: Utilized in the multi-step synthesis of other high-value, specialty chemicals requiring its specific aldehyde and cyclic structure.

Basic Information

Product Name	Acetaldehyde, [2-Methyl-5-(1-Methylethyl)cyclopentylidene]-, (1E,2Alpha,5Alpha)- (9Ci)
CAS No.	189040-37-7
Molecular Formula	C11H18O
Molecular Weight	166.26 g/mol
Synonyms	(1E,2α,5α)-2-Methyl-5-(1-methylethyl)cyclopentylideneacetaldehyde; (1E,2α,5α)-2-Isopropyl-5-methylcyclopentylideneacetaldehyde; (E)-2-((2α,5α)-2-Isopropyl-5-methylcyclopentylidene)acetaldehyde; 2-[(2α,5α)-2-Isopropyl-5-methylcyclopentylidene]acetaldehyde; (1E,2α,5α)-2-Isopropyl-5-methyl-1-cyclopentylideneacetaldehyde; (E)-2-((2α,5α)-2-Isopropyl-5-methylcyclopentylidene)ethanal
EINECS	Contact for details

Quality Control

Our production of Acetaldehyde, [2-Methyl-5-(1-Methylethyl)cyclopentylidene]-, (1E,2Alpha,5Alpha)- (9Ci) adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity analysis, to ensure it meets the exacting standards required for research and fine chemical synthesis. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment to guarantee traceability and consistency for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated area. Recommended storage temperature is 2-8°C for long-term stability. This compound is easily oxidized and moisture-sensitive; ensure containers are sealed immediately after use to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Chiral Purity (Chiral GC/HPLC)	≥ 98.0% de
Water Content (KF)	≤ 0.5%

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