General name: MAA, methacrylic acid
Sales format: Liquid (drum cans, ISO containers, tanker trucks)
CAS number: 79-41-4
Chemical Substances Control Law number: (2)-1025
Form: Liquid
Color: Colorless
Odor: Pungent odor
Melting point: 15ºC
Boiling point: 161ºC
Flash point: 73ºC (tag closed cup test)
Flammability limits: Lower: 1.6 vol %. Upper: 8.8 vol %
Vapor pressure: 133.3 Pa ( 1mmHg) (25.5ºC)/1333 Pa (10mmHg) (60.6ºC)
Specific gravity: 1.015 (20ºC)
Water solubility: Highly soluble
Partition coefficient: n-octanol/water: Log Pow=0.93 (actual measurement)
Electrical conductivity: 23.3pS/m (30ºC)
Refractive index: 1.4320 (20ºC)
Viscosity: 1.30×10-3Pa･s (20ºC)
MAA is manufactured by dehydrating and hydrolyzing intermediates in the MMA production process. MAA is a useful material for various esters, lubricant additives and concrete admixtures, among other applications.
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.
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