Description

3-Buten-2-One, 4-(Methylthio)-, (3E)- (9Ci) is a sulfur-containing α,β-unsaturated ketone, a versatile chemical intermediate characterized by its reactive methylthio and carbonyl groups. This compound matters for its role in synthesizing complex molecules, particularly in the development of pharmaceuticals and agrochemicals where the introduction of sulfur-containing moieties is critical. Industries such as fine chemical synthesis, fragrance research, and material science need this high-purity building block for creating novel compounds with specific biological or physical properties.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly those containing thioether or heterocyclic structures.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and fungicides, leveraging its reactive sites for structural diversification.
• Flavor & Fragrance Ingredient: Serves as a precursor for sulfur-containing aroma chemicals, contributing to savory, roasted, or tropical notes in high-value fragrance and flavor formulations.
• Material Science Research: Employed in the development of novel polymers, ligands for catalysis, and organic electronic materials due to its conjugated system and functional handles.
• Organic Synthesis Reagent: Acts as a Michael acceptor or an electrophile in various name reactions, enabling the construction of complex carbon skeletons in academic and industrial R&D.

Basic Information

Product Name	3-Buten-2-One, 4-(Methylthio)-, (3E)- (9Ci)
CAS No.	33944-94-4
Molecular Formula	C5H8OS
Molecular Weight	116.18 g/mol
Synonyms	(E)-4-(Methylthio)-3-buten-2-one; 4-(Methylthio)-3-buten-2-one, (E)-; trans-4-(Methylthio)-3-buten-2-one; 4-Methylmercapto-3-buten-2-one; 3-Buten-2-one, 4-(methylthio)-, (3E)-; 4-(Methylsulfanyl)but-3-en-2-one; (E)-4-(Methylsulfanyl)but-3-en-2-one; 4-Methylthiobut-3-en-2-one
EINECS	Contact for details

Quality Control

Our production of 3-Buten-2-One, 4-(Methylthio)-, (3E)- (9Ci) adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistent isomeric composition. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is light-sensitive (store away from light) and should be kept under an inert atmosphere if long-term storage is required to prevent degradation.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Purity (GC/HPLC)	≥ 97.0% (Area %)
Isomeric Purity ((E)-isomer)	≥ 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.