Description

(E)-4-Chloro-2-Methyl-But-2-Enal is a versatile chlorinated α,β-unsaturated aldehyde that serves as a critical building block in advanced organic synthesis. Its unique structure, featuring both an aldehyde and a chloroalkene group, makes it a valuable electrophile for constructing complex molecular frameworks. This intermediate is essential for research and production in the pharmaceutical and agrochemical sectors, where it is used to develop active ingredients and novel compounds. We supply this high-purity chemical with a focus on batch-to-batch consistency and reliable global delivery.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring chlorinated alkene or aldehyde functionalities.
• Agrochemical Synthesis: Building block for creating herbicides, fungicides, and insecticides, leveraging its reactivity for structural diversification.
• Fine Chemical Production: Used in the manufacture of specialty chemicals, flavors, and fragrances where specific chlorinated aldehydes are required.
• Organic Synthesis Research: Valuable reagent in academic and industrial R&D for Diels-Alder reactions, nucleophilic additions, and as a Michael acceptor.
• Material Science: Potential monomer or cross-linking agent in the development of specialty polymers and resins.

Basic Information

Product Name	(E)-4-Chloro-2-Methyl-But-2-Enal
CAS No.	3330-25-4
Molecular Formula	C5H7ClO
Molecular Weight	118.56 g/mol
Synonyms	trans-4-Chloro-2-methyl-2-butenal; 4-Chloro-2-methylcrotonaldehyde; (E)-4-Chloro-2-methylbut-2-enal; 2-Butenal, 4-chloro-2-methyl-, (E)-; 4-Chloro-2-methyl-2-buten-1-al; Crotonaldehyde, 4-chloro-2-methyl-; 3330-25-4; (E)-4-Chloro-2-methylbut-2-en-1-al
EINECS	222-058-6

Quality Control

Our (E)-4-Chloro-2-Methyl-But-2-Enal is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including GC, HPLC, and NMR, to ensure high purity and identity confirmation. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all specification parameters. Our quality commitment ensures the material is suitable for demanding applications in regulated industries, including pharmaceutical research and development.

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 place. Recommended storage temperature is 2-8°C to minimize degradation. Keep away from heat, sparks, and open flame. This material is light-sensitive and easily oxidized; prolonged exposure to air or light should be avoided.

Specification

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