Description

Crotonyl Chloride is a highly reactive organic acid chloride, a key building block for introducing the crotonyl moiety into complex molecules. Its primary value lies in its versatility as an acylating agent and its role as a crucial intermediate in the synthesis of pharmaceuticals, agrochemicals, and advanced materials. This compound is essential for R&D and production chemists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop new active ingredients or functional materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring the crotonamide or crotonate ester functionality.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides, where it acts as an acylating agent for amine or alcohol components.
• Polymer & Material Science: Serves as a monomer or modifying agent for creating specialty polymers, coatings, and resins with specific thermal or chemical resistance properties.
• Organic Synthesis Reagent: A valuable reagent in academic and industrial laboratories for Friedel-Crafts acylation, esterification, and amide coupling reactions.
• Dye & Pigment Manufacturing: Intermediate in the synthesis of certain organic dyes and pigments, contributing to chromophore development.
• Crosslinking Agent: Can be utilized in the formulation of crosslinked polymers and networks for adhesives or composite materials.

Basic Information

Product Name	Crotonyl Chloride
CAS No.	10487-71-5
Molecular Formula	C4H5ClO
Molecular Weight	104.54 g/mol
Synonyms	Crotonic acid chloride; (E)-But-2-enoyl chloride; 2-Butenoyl chloride; trans-Crotonyl chloride; Crotonoyl chloride; 2-Butenoic acid chloride; 3-Methylacryloyl chloride
EINECS	234-001-5

Quality Control

Our Crotonyl Chloride is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including assay by GC or titration and impurity profile analysis, to ensure it meets high-purity standards suitable for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and specific test results is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at temperatures between 2°C and 8°C (refrigerated) to minimize degradation and volatility. Due to its highly volatile, hygroscopic, and strong acid/organic solvent nature, it must be kept away from moisture, heat, and incompatible materials such as bases, alcohols, and oxidizing agents. Use appropriate corrosion-resistant storage equipment.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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