(Hydroxyethyl)methacrylate

Hydroxyethylmethacrylate or HEMA is the monomer that is used to make the polymer PolyHydroxyethylmethacrylate. The polymer is hydrophilic; therefore, when the polymer is subjected to water it will swell. Depending on the physical and chemical structure of the polymer, it is capable of absorbing from 10 to 600% water relative to the dry weight. Because of this property, it was one of the first materials to be successfully used in the manufacture of flexible contact lenses

CAS Number: 868-77-9 CAS Type 1 name: 2-propenoic acid, 2-methyl-, 2-hydroxyethyl ester

Molecular formula: C6H10O3

Systematic formula: H2C=C(CH3)COOCH2CH2OH

Molecular Weight: 130.14