Chemical Fact Sheet

Chemical Abstract Number (CAS #) 80626
CASRN 80-62-6
SynonymsMethyl methacrylate
2-Propenoic acid, 2-methyl-, methyl ester
Analytical Methods EPA Method 524.2
EPA Method 8260
Molecular FormulaC5H8O2

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use USED IN IMPREGNATION OF CONCRETE MONOMER FOR POLYMETHYL METHACRYLATE COMONOMER FOR COPOLYMERS-EG, WITH ACRYLIC ESTERS CHEM INT FOR HIGHER METHACRYLATE ESTERS-EG, STEARYL Used in the production of polymers such as surface coating resins, plastics (Plexiglas and Lucite), ion exchange resins and plastic dentures. In intraocular lenses THE METHYL METHACRYLATE MONOMER AND POLYMERS HAVE WIDE APPLICABILITY IN MEDICAL TECHNOLOGY AS BONE CEMENT, BUT HAVE BEEN PARTIALLY REPLACED BY BUCRYLATE & SIMILAR SYNTHETICS. ALSO SERVES AS MEDICINAL SPRAY ADHESIVE OR NONIRRITANT BANDAGE SOLVENT, & IN DENTAL TECHNOLOGY AS CERAMIC FILLER OF CEMENT. Hard contact lenses with wettable surfaces were prepared from copolymers of hydroxyethyl methacrylate (5-15 wt%) with methyl methacrylate (85-95 wt%). Co-polymerization of methyl methacrylate (80-90%) with acrylic acid (10-20%), and diverse cross-linking agents, followed by neutralization of the polymerized acrylic acid with a basic substance, such as ammonium hydroxide or ethylenimine, produce hydrogels used for contact lenses. Acrylic Acid Concrete can also be made water-repellent by the polymerization of vinyl monomers on the surface. A treatment that may be practical for highway bridge decks is the application of methyl methacrylate, isodecyl methacrylate, or isobutyl methacrylate.
Consumption Patterns MONOMER IN POLYMERS USED FOR ACRYLIC SHEET, 28%; FOR SURFACE COATING RESINS, 25%; FOR MOULDING & EXTRUSION COMPOUNDS, 21%; AS POLYMER PROCESSING AIDS & IMPACT MODIFIERS 6%; MONOMER IN EMULSION POLYMERS, 10%; IN UNSATURATED POLYESTER RESINS, 4%; CHEM INT FOR HIGHER METHACRYLATE ESTERS, 2%; OTHER USES (MOSTLY AS A MONOMER), 4% (1982). Surface coatings, 33%; cast and extruded sheet, 30%; molding and extrusion compounds, 25%; misc, 2%; exports, 10% (1984). CHEMICAL PROFILE: Methyl methacrylate. Cast and extruded heat, 25%; molding powders and resins, 25%; surface coatings, 20%; impact modifiers, 10%; exports, 8%; other emulsion polymers, 6%; polyester modifiers, 4%; higher methacrylates, 2%. CHEMICAL PROFILE: Methyl methacrylate. Demand: 1987: 1,028 million pounds; 1988: 1,055 million pounds; Trend: 1992: 1,164 million pounds (includes exports, but excludes monomer imports, which were one quarter of exports last year.)
Odor Sharp, fragrant, pleasant smelling, pungent ; Acrid, fruity odor ; SWEETISH, CHARACTERISTIC ODOR
Boiling Point 100-101 DEG C @ 760 MM HG
Melting Point -48 DEG C
Molecular Weight 100.12
Density 0.9440 @ 20 DEG C/4 DEG C
Odor Threshold Concentration 0.05 ppm 0.21 ppm
Sensitivity Data The vapors are irritating to the eyes and resp system. Irritating to skin.
Environmental Impact Methyl methacrylate may enter the atmosphere or be released into wastewater or on land during its production, use in the manufacture of resins and plastics, transport or storage. If released into water it will principally be lost by volatilization (half-life 6.3 hr from a typical river). If spilled on land, it will volatilize and leach into the groundwater where its fate is unknown. If emitted into the atmosphere, it will photodegrade (half-life 2.7 hr in urban areas and > 3 hr in rural areas). It would not be expected to bioconcentrate in fish. Human exposure will be primarily in the workplace although it is possible that the monomer can migrate into food from polymethyl methacrylate wrappers. .
Environmental Fate TERRESTRIAL FATE: When spilled on soil, methyl methacrylate would be expected to both volatilize and leach into the groundwater. Some biodegradation would be expected to occur especially where acclimated microorganisms exist. . AQUATIC FATE: When released into water, methyl methacrylate will primarily be lost through volatilization (half-life 6.3 hr for a typical river). Some biodegradation or degradation due to reaction with photolytically produced radicals may occur but no estimates for rates of these reactions are available. No appreciable adsorption to sediment or particulate matter will occur. ATMOSPHERIC FATE: Methyl methacrylate released to the atmosphere will degrade by reaction with reactive atmospheric species with typical half-lives of 2.7 hr in urban and > 3 hr in rural areas.
Drinking Water Impact DRINKING WATER: Finished water < 1.0 ppb . Detected in commercial deionized charcoal-filtered water . It was suggested that this could have originated from the plastics used in the preparation or storage of the ion-exchange resin or charcoal . SURFACE WATER: 14 heavily industrialized river basins in U.S. (204 sites) - 1 site positive, 10 ppb in Chicago area ; Lake Michigan (91 sites) - 1 site positive 10 ppb . EFFL: Concentration of methyl methacrylate in exhaust stacks from a plant where acrylic resin based paints were dried 5-20 ppm . Gaseous product of the combustion of polymethyl methacrylate .

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