Description

2-Methyl-3-Butenoic Acid is a versatile, unsaturated carboxylic acid that serves as a valuable building block in organic synthesis. Its reactive terminal alkene and carboxylic acid functionalities make it a key intermediate for creating complex molecules with tailored properties. This compound is essential for R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to introduce specific structural motifs.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of active pharmaceutical ingredients (APIs), particularly in the development of prostaglandins and other bioactive molecules.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators, leveraging its reactive sites for structural diversification.
• Specialty Polymer Monomer: Acts as a co-monomer to introduce side-chain unsaturation and carboxylic acid groups into polymers, modifying properties like adhesion, cross-linking potential, and solubility.
• Flavor and Fragrance Ingredient: Serves as a precursor for esters and lactones that contribute fruity and creamy notes to complex aroma profiles.
• Fine Chemical Production: Employed in multi-step organic syntheses to construct complex natural products, dyes, and photoinitiators.
• Cross-linking Agent: The alkene group allows it to function as a cross-linker in resin and coating formulations, enhancing durability and chemical resistance.

Basic Information

Product Name	2-Methyl-3-Butenoic Acid
CAS No.	53774-20-2
Molecular Formula	C5H8O2
Molecular Weight	100.12 g/mol
Synonyms	3-Butenoic acid, 2-methyl-; 2-Methylbut-3-enoic acid; 2-Methyl-3-butenoic acid; 2-Methylallylacetic acid; 3-Butenoic acid, 2-methyl- (8CI,9CI); Vinylacetic acid, 2-methyl-; β,γ-Dimethylacrylic acid; 2-Methyl-3-butenoic acid (VAA)
EINECS	258-785-5

Quality Control

Our 2-Methyl-3-Butenoic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including GC, HPLC, and NMR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with each shipment. We support compliance with REACH and other global regulatory frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at 15-25°C under an inert atmosphere (e.g., nitrogen) to prevent oxidation. Keep away from heat, sparks, and open flame. Isolate from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (20°C)	1.428 - 1.432
Density (20°C)	1.00 - 1.03 g/mL

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