Description

3-Butenoic Acid, 3-Methyl- is a versatile, unsaturated carboxylic acid derivative that serves as a valuable building block in organic synthesis. Its unique structure, featuring both a carboxylic acid group and a reactive terminal alkene, makes it a critical intermediate for creating complex molecules. This compound is essential for research and development chemists and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to introduce functionalized side chains or create novel heterocyclic compounds.

Application

• Pharmaceutical Intermediate: Key starting material or building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a vinyl-substituted carboxylic acid moiety.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators, where its reactive sites allow for the creation of targeted bioactive molecules.
• Specialty Polymer & Resin Production: Acts as a monomer or co-monomer for synthesizing specialty polymers with tailored properties, such as adhesives, coatings, and functional materials.
• Fine Chemical & Flavor/Fragrance Intermediate: Employed in the multi-step synthesis of complex fine chemicals, aroma chemicals, and fragrance ingredients.
• Organic Synthesis & Research Reagent: A valuable reagent in academic and industrial R&D labs for Diels-Alder reactions, Michael additions, and other carbon-carbon bond-forming transformations.
• Crosslinking Agent: Utilized in formulations where the alkene group can participate in crosslinking reactions to enhance material durability and performance.

Basic Information

Product Name	3-Butenoic Acid, 3-Methyl-
CAS No.	1617-31-8
Molecular Formula	C5H8O2
Molecular Weight	100.12 g/mol
Synonyms	3-Methyl-3-butenoic acid; 3-Methylbut-3-enoic acid; Isopropenylacetic acid; 3-Butenoic acid, 3-methyl-; β,β-Dimethylacrylic acid (less common); 3-Methyl-3-buten-1-oic acid; Vinylacetic acid, 3-methyl-
EINECS	216-574-5

Quality Control

Our 3-Methyl-3-butenoic acid is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including chromatography (HPLC, GC) and spectroscopic methods (IR, NMR), to ensure identity, purity, and consistency. Certificates of Analysis (COA) with detailed batch-specific results are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from incompatible materials such as strong bases, oxidizing agents, and reducing agents. Recommended storage temperature is 2-8°C for long-term stability, as the compound is a strong acid/organic solvent. Keep container tightly sealed when not in use to minimize moisture absorption and degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.425 - 1.435
Density (g/mL at 20°C)	0.98 - 1.02

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