Methacrylic acid appears as a 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. Methacrylic acid is an alpha,beta-unsaturated monocarboxylic acid that is acrylic acid in which the hydrogen at position 2 is substituted by a methyl group. It derives from an acrylic acid. It is a conjugate acid of a methacrylate.
Physical & Chemical Properties
Molecular FormulaC4H6O2
Density:1.02g/cm³g/cm³
Boiling Point:159-163°C
Solubility:
Soluble in water, miscible with ethanol, diethyl ether, acetone, benzene, chloroform and most other organic solvents.
Molecular Weight:86.09g/mol
Flash Point:68℃
Melting Point:16°C
Uses
1. Core Downstream Applications:Preparation of methyl methacrylate (MMA), and further production of polymethyl methacrylate (PMMA), molding compounds and optical materials.
2. Coatings & Adhesives:Synthesis of acrylic resins and emulsions for automotive coatings, industrial anti-corrosion coatings, construction adhesives and sealants.
3. Polymer Materials:Production of special rubber, ion exchange resins, water-absorbent resins and textile dyeing & finishing auxiliaries.
4. Other Fields:Used in dental materials, paper chemicals, lubricant additives and functional monomer synthesis.
Safety, Security & Risk
Physical Hazards
Vapors may polymerize without inhibitor, resulting in vent blockage.
Chemical Hazards
The substance is a moderately strong acid.It readily polymerizes when heated, exposed to light, oxidizing agents (e.g. peroxides), or in the presence of trace hydrochloric acid.There is a risk of fire or explosion.Toxic fumes and gases may be formed.Corrosive to metals.