Description

3-Butenoyl Chloride, 2-Methyl- is a reactive organic acid chloride derivative used as a key building block in chemical synthesis. This compound is valued for its ability to introduce the 2-methyl-3-butenoyl functional group into target molecules, enabling the creation of more complex chemical architectures. It is primarily sought by R&D chemists and process development teams in the pharmaceutical, agrochemical, and specialty chemical industries for applications in active ingredient synthesis and material science.

Application

• Pharmaceutical Intermediate: A crucial building block for synthesizing active pharmaceutical ingredients (APIs), particularly those requiring a functionalized butenoyl side chain.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators.
• Polymer Chemistry: Serves as a monomer or co-monomer for creating specialty polymers with tailored properties.
• Fine Chemical Production: Employed in the multi-step synthesis of complex organic molecules for flavors, fragrances, and electronic chemicals.
• Cross-coupling Reactions: Acts as an electrophile in various metal-catalyzed coupling reactions to form carbon-carbon bonds.
• Peptide & Protein Modification: Used for acylation reactions to modify amino acids, peptides, or other biomolecules.

Basic Information

Product Name	3-Butenoyl Chloride, 2-Methyl-
CAS No.	24560-24-5
Molecular Formula	C5H7ClO
Molecular Weight	118.56 g/mol
Synonyms	2-Methyl-3-butenoyl chloride; 3-Butenoyl chloride, 2-methyl-; 2-Methylbut-3-enoyl chloride; 3-Butenoic acid, 2-methyl-, chloride; 2-Methylvinylacetyl chloride; (2-Methyl-3-butenoyl) chloride; 3-Butenoyl chloride, 2-methyl- (9CI)
EINECS	Contact for details

Quality Control

Our 3-Butenoyl Chloride, 2-Methyl- is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or HPLC and impurity profiling, to ensure high purity and consistency. Certificates of Analysis (COA) detailing all specifications and test results are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Due to its hygroscopic and strong acid/organic solvent nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as bases, alcohols, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC/HPLC)	Total impurities ≤ 3.0%
Density (at 20°C)	~1.05 g/cm³

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