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Skeletal formula of Hydroxyethyl methacrylate
Ball-and-stick model of the hydroxyethyl methacrylate molecule
IUPAC name
2-Hydroxyethyl 2-methylprop-2-enoate
Other names
HEMA; hydroxyethylmethacrylate; glycol methacrylate; glycol monomethacrylate; hydroxyethyl methacrylate; ethylene glycol methacrylate; 2-(methacryloyloxy)ethanol
3D model (JSmol)
ECHA InfoCard 100.011.621
Molar mass 130.14 g·mol−1
Appearance Colourless liquid
Density 1.07 g/cm3
Melting point −99 °C (−146 °F; 174 K)[2]
Boiling point 213 °C (415 °F; 486 K)[2]
log P 0.50[1]
Vapor pressure 0.08 hPa
Main hazards Eye irritation
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Hydroxyethylmethacrylate or HEMA is the monomer that is used to make the polymer polyhydroxyethylmethacrylate. The polymer is hydrophobic; however, when the polymer is subjected to water it will swell due to the molecule's hydrophilic pendant group. 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 soft contact lenses[3]

Use in 3D printed glass[edit]

HEMA is also used as the monomeric matrix in which 40 nm silica particles are suspended for 3D glass printing.[4]


  1. ^ "2-hydroxyethyl methacrylate_msds".
  2. ^ a b "GPS Safety Summary 2-Hydroxyethyl methacrylate (HEMA)". July 2013.
  3. ^ Blasco, Joe; Kehoe, Vincent J-R; The professional make-up artist : motion pictures, television, print, theatre; ISBN 0-9771580-0-4; LCC# PN2068.B53 2005
  4. ^ Kotz (20 April 2017). "Three-dimensional printing of transparent fused silica glass". Nature. Retrieved 27 April 2017.