Description

(E)-5-Methyl-3-Pentene-2-One is a high-purity, unsaturated ketone with a distinctive structure, serving as a versatile intermediate in advanced organic synthesis. Its value lies in its ability to introduce specific functional groups and stereochemistry into target molecules, enabling the production of complex fine chemicals and active ingredients. This compound is essential for research and development chemists and manufacturers in the pharmaceutical, agrochemical, and fragrance industries seeking to build sophisticated molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs) and complex drug candidates.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators.
• Fragrance & Flavor Ingredient: Serves as a precursor for musk-like odorants and other specialty aroma chemicals.
• Organic Synthesis Reagent: Acts as a Michael acceptor or a dienophile in cycloaddition reactions for constructing complex organic frameworks.
• Material Science Research: Employed in the development of novel polymers and functional materials.
• Chemical Research & Development: A valuable tool for exploring new synthetic methodologies and catalytic processes in academic and industrial labs.

Basic Information

Product Name	(E)-5-Methyl-3-Pentene-2-One
CAS No.	4376-23-2
Molecular Formula	C6H10O
Molecular Weight	98.14 g/mol
Synonyms	(E)-5-Methyl-3-penten-2-one; (E)-5-Methylpent-3-en-2-one; 5-Methyl-3-penten-2-one; Mesityl oxide (Note: Mesityl oxide typically refers to a mixture of isomers, primarily 4-Methyl-3-penten-2-one); 3-Penten-2-one, 5-methyl-; (E)-4-Methyl-3-penten-2-one (common misnomer); Isopropylideneacetone; 2-Methyl-2-penten-4-one
EINECS	224-482-9

Quality Control

Our (E)-5-Methyl-3-Pentene-2-One is produced under stringent quality management systems. Every batch undergoes rigorous analytical testing, including GC, HPLC, and NMR, to ensure high chemical purity and isomeric integrity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing purity, identity, and impurity profiles. Our quality commitment supports applications requiring reproducible results and regulatory compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent evaporation and potential contamination.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0% (Area %)
(E)-Isomer Content (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.440 - 1.444
Density (20°C)	0.855 - 0.865 g/mL

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