Methacrylic Acid

mp16 °Cbp163°C(lit.)density1.015g/mLat 25°C(lit.)vapor density>3 (vs air)vapor pressure1 mm Hg ( 20 °C)refractive indexn20/D 1.431(lit.)Fp170°Fstorage temp.IndoorsWater Solubility9.7 g/100 mL (20 ºC)Merck145,941BRN1719937Stability:May be stabilized by the addition of MEHQ (Hydroquinone methyl ether, ca. 250 ppm) or hydroquinone. In the absence of a stabilizer this material will readily polymerize. Combustible. Incompatible with strong oxidizing agents, hydrochloric acid.CAS DataBase Reference79-41-4(CAS DataBase Reference)NIST Chemistry Reference2-Propenoic acid, 2-methyl-(79-41-4)EPA Substance Registry System2-Propenoic acid, 2-methyl-(79-41-4)Hazard CodesCRisk Statements21/22-35Safety Statements26-36/37/39-45RIDADRUN 2531 8/PG 2RTECSOZ2975000PackingGroupIIHazardous Substances Data79-41-4(Hazardous Substances Data)General DescriptionA clear colorless liquid (or low-melting solid) with a pungent odor. Corrosive to metals and tissue. Flash point 170°F. Melting point 61°F. May polymerize exothermically if heated or contaminated. If the polymerization takes place inside a container, the container may rupture violently. Less dense than water. Vapors heavier than air. Used to make plastics.