What is glycidyl methacrylate, the chemical leaked after Ohio tanker explosion?

A tanker carrying glycidyl methacrylate (GMA), a chemical used in manufacturing and improving industrial materials, exploded in Toledo, Ohio, prompting an evacuation order within a one-mile radius. GMA is stored as a liquid but becomes a gas when released into the air. Exposure can irritate the eyes, nose, mouth, skin and respiratory system and can cause burning sensations.