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Hydroxyethyl methacrylate (HEMA) is a monomeric ester of methacrylic acid. It is a clear, colorless liquid with a characteristic acrid odor. The chemical formula of HEMA is C6H10O3, and its structure includes a hydroxy group (OH) and an ethyl group (-C2H5). The molecular weight of HEMA is approximately 130.15 g/mol.

Here are some key points about hydroxyethyl methacrylate:

Usage in Polymers: HEMA is widely used in the production of various polymers and copolymers. It undergoes polymerization reactions to form polymers with different properties, depending on the specific conditions and other monomers used in the process.

Cross-Linking Agent: It is often used as a cross-linking agent in the synthesis of hydrogels, which have applications in contact lenses, drug delivery systems, and biomedical materials.

Adhesives and Sealants: HEMA is a common component in the formulation of adhesives and sealants. It contributes to the adhesive properties and flexibility of the final product.

Dental Materials: In dentistry, HEMA is used in the production of dental materials, including adhesives, composites, and dental bonding agents.

Biomedical Applications: Due to its biocompatibility, HEMA is used in biomedical applications, such as in the development of controlled drug delivery systems and tissue engineering scaffolds.

UV-Curable Coatings: HEMA is utilized in UV-curable coatings, where exposure to ultraviolet (UV) light initiates the polymerization process, leading to the formation of a durable coating.

Textile Treatments: It may be used in the treatment of textiles to improve properties such as water repellency.

As with any chemical, it's important to handle hydroxyethyl methacrylate with care, and its use is subject to regulatory guidelines to ensure safety in various applications. Always follow recommended safety precautions and guidelines when working with or around this compound.