Methyl methacrylate

An unsaturated ester that forms acrylic polymer PMMA.

Formula
C5H8O2
Functional group
Alkene and ester groups
Molar mass
100.12 g/mol
Also known as
MMA, methyl 2-methylprop-2-enoate

Overview

MMA

An unsaturated ester that forms acrylic polymer PMMA.

The C=C group builds the polymer backbone. The ester group stays as a side group: PMMA is made by addition polymerisation, not by polyester condensation.

Identifiers

Formula
C5H8O2
Functional group
Alkene and ester groups
Molar mass
100.12 g/mol
Also known as
MMA, methyl 2-methylprop-2-enoate
Chemical identifiers
SMILES
C=C(C)C(=O)OC
InChI
InChI=1S/C5H8O2/c1-4(2)5(6)7-3/h1H2,2-3H3
PubChem CID
6658

Properties

Melting Point
-47.55 °C
Boiling Point
100.5 °C
Density
0.9337 g/cu cm at 25 °C
Water solubility
1.500 lb/100 lb water at 68.02 °F

Related compounds

  • Alkenes

    An unsaturated ester that forms acrylic polymer PMMA.

  • Esters

    An unsaturated ester that forms acrylic polymer PMMA.

References

  1. Manufacturing acrylic glass from MMAPLEXIGLAS / POLYVANTIS
  2. PubChem: Methyl methacrylateNational Center for Biotechnology Information

    Identity retrieved 2026-09-08; matched against the record's isomeric structure. Unspecified stereochemistry remains unspecified.

  3. Hazardous Substances Data Bank (HSDB): Methyl methacrylate — melting pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6658#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL 2007, p. 3-358

  4. Hazardous Substances Data Bank (HSDB): Methyl methacrylate — boiling pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6658#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL 2007, p. 3-358

  5. Hazardous Substances Data Bank (HSDB): Methyl methacrylate — densityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6658#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL 2007, p. 3-358

  6. Hazardous Substances Data Bank (HSDB): Methyl methacrylate — solubilityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6658#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5.