>>63 https://www.britannica.com/science/styrene
Pure styrene is a clear, colourless, flammable liquid that boils at 145 °C (293 °F) and freezes at −30.6 °C (−23.1 °F). Unless treated with inhibitor chemicals, it has a tendency to polymerize spontaneously during storage. It is slightly toxic to the nervous system if ingested or inhaled, and contact with the skin and eyes can cause irritation. Although it is suspected of being carcinogenic, studies have not proved it to be so.