Methacrylic acid is a colorless crystal or transparent liquid with a pungent odor. It is soluble in hot water, soluble in most organic solvents such as ethanol and ether. Easily polymerized into water-soluble polymers. It is flammable, and it may burn when exposed to high heat and open flames. It can produce toxic gas when it is decomposed by heat.

Methacrylic acid is a colorless crystal or transparent liquid with a pungent odor. It is soluble in hot water, soluble in most organic solvents such as ethanol and ether. Easily polymerized into water-soluble polymers. It is flammable, and it may burn when exposed to high heat and open flames. It can produce toxic gas when it is decomposed by heat.