Methacrylic Acid

Cas Number


Other Names





The formula



Methacrylic acid (MAA) is an organic compound. This colorless, viscous liquid is a carboxylic acid with an acrid unpleasant odor. It is soluble in warm water and miscible with most organic solvents. Methacrylic acid is produced industrially on a large scale as a precursor to its esters, especially methyl methacrylate (MMA) and poly(methyl methacrylate) (PMMA).

Physical and Chemical Properties
Physical state and appearance Liquid. (Above room temperature)
Odor Repulsive. (Strong.)
Molecular Weight 86.09 g/mole
Color Colorless
Boiling Point 163°C (325.4°F)
Flash point CLOSED CUP: 77°C (170.6°F
Melting Point 16°C (60.8°F)
Specific Gravity 1.015 (Water = 1)
Vapor Pressure: 0.975 mm of Hg (@ 20°C)
Vapor Density 2.97 (Air = 1)
Dispersion Properties See solubility in water, diethyl ether, acetone.
Solubility Partially soluble in diethyl ether, acetone. Very slightly soluble in methanol, n-octanol.
Purity 98.0% min
Water 0.3% max
Inhibitor 200 ±10 ppm (monomethyl ether hydroquinone)

1. Surface coatings, Auxiliaries for the leather and textile industries, Flocculants, Ion exchangers, Soil improvers (poly-electrolytes)

2. Textile Processing - Sizing, Leather technology - Binder, tanning agent, Ion-exchange resins - Water treatment

3. Cosmetics - Thickening agent, suspending agent

4. Oil-well Drilling - Drilling-mud additive, anti-caking agent

5. Industrial-waste treatments - Suspending agent, flocculating agent

6. Paper Industry - Filler-retention aid, Transportation - Skid-proof tyres, Rubber technology - Creaming of latex

7. Agriculture - Soil conditioners

8. Others - Coating, adhesive