Description

4,4-Dimethyl-5-Methylene-γ-Butyrolactone is a specialized lactone derivative characterized by its reactive exocyclic methylene group. This compound is valued as a versatile chemical intermediate for its ability to undergo various addition and ring-opening reactions, enabling the synthesis of complex molecular architectures. It is primarily sought by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and fine chemical sectors for developing active ingredients and novel materials.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with lactone or modified butyrolactone cores.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and plant growth regulators.
• Fine Chemical Production: Acts as a precursor for flavors, fragrances, and other high-value specialty chemicals.
• Polymer & Material Science: Employed as a monomer or cross-linking agent in the development of specialty polymers and resins.
• Organic Synthesis Research: A valuable reagent in academic and industrial R&D for Diels-Alder reactions, Michael additions, and other cyclization processes.

Basic Information

Product Name	4,4-Dimethyl-5-Methylene-γ-Butyrolactone
CAS No.	65371-43-9
Molecular Formula	C7H10O2
Molecular Weight	126.15 g/mol
Synonyms	5-Methylene-4,4-dimethyl-dihydrofuran-2(3H)-one; 4,4-Dimethyl-5-methylenedihydro-2(3H)-furanone; 5-Methylene-4,4-dimethylbutyrolactone; 4,4-Dimethyl-5-methylenebutanolide; 5-Methylenedihydro-4,4-dimethyl-2(3H)-furanone; 4,4-Dimethyl-5-methylenetetrahydro-2-furanone
EINECS	Contact for details

Quality Control

Our 4,4-Dimethyl-5-Methylene-γ-Butyrolactone is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specific results for all critical parameters are provided and available upon request, supporting compliance in regulated applications.

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). Keep away from strong bases and incompatible organic solvents. For long-term storage, consider under an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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