Description

Methylene Dimethacrylate is a high-purity, difunctional methacrylate monomer widely used as a crosslinking agent in polymer chemistry. Its molecular structure, featuring two reactive methacrylate groups, is critical for creating durable, three-dimensional polymer networks with enhanced thermal and mechanical properties. This compound is essential for manufacturers in the dental materials, specialty adhesives, advanced coatings, and optical lens industries seeking to improve product performance and longevity.

Application

• Dental Composites & Restorative Materials: A key crosslinker in resin-based composites, crowns, and fillings, providing strength, wear resistance, and dimensional stability.
• Specialty Adhesives & Sealants: Used to formulate high-performance industrial and structural adhesives with excellent bonding strength and chemical resistance.
• Advanced Coatings & Inks: Imparts hardness, scratch resistance, and durability to UV-curable coatings for electronics, flooring, and automotive applications.
• Optical Polymers & Lenses: Serves as a co-monomer in the production of high-refractive-index plastics for eyeglass lenses and optical components.
• Biomedical & Hydrogel Polymers: Employed in the synthesis of controlled-release drug delivery systems and biocompatible hydrogel matrices.
• Industrial Polymer Modification: Acts as a crosslinking agent to modify the properties of acrylic resins, improving their heat and solvent resistance.

Basic Information

Product Name	Methylene Dimethacrylate
CAS No.	4245-38-9
Molecular Formula	C9H12O4
Molecular Weight	184.19 g/mol
Synonyms	Ethylene Glycol Dimethacrylate (common misnomer, but often used interchangeably); 2-Methyl-2-propenoic Acid 1,1'-Methylenedi-2,1-ethanediyl Ester; 1,3-Bis(methacryloyloxy)-2-methylpropane; 2,2-Bis(methacryloyloxymethyl)propane (less common); MDMA (abbreviation); Methylene Bis(methacrylate); Dimethacrylate of Methylene Glycol
EINECS	224-208-8

Quality Control

Our Methylene Dimethacrylate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including GC/HPLC for assay and purity, to ensure it meets precise specifications for critical applications like dental and biomedical polymers. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). Keep away from heat, sparks, and open flame. This product is light-sensitive (store away from light) and is compatible with strong acids and organic solvents. For long-term storage under an inert atmosphere such as nitrogen is recommended to prevent premature polymerization.

Specification

Item	Specification
Appearance	Clear, Colorless to Pale Yellow Liquid
Identification (IR)	Conforms
Assay (GC/HPLC)	≥ 98.0 %
Water Content (KF)	≤ 0.1 %
Acid Value	≤ 0.5 mg KOH/g
Refractive Index (n20D)	1.468 - 1.472
Density (20°C)	1.05 - 1.09 g/cm³

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