Also known as PMMA, plexiglass, or lucite. It's similiar to Polystyrene, but more string and durable. Bulletproof. Banks and taxi cabs,and jet fighter canopys are made of it.

Most hard contact lenses are made of this. The disadvantage of hard contacts is that it is more rigid, not oxygen-permeable and therefore doesn't allow the eye to "breathe." Also, calciumand bacteria deposits can collect on the lens if it is not cleaned regularly, causing infection.

It is soluble in toluene.