CAS: 110-65-6 EC No: 203-788-6 MDL No: MFCD00002915 RTECS: ES0525000 UN No: UN2716; Haz Class: 6.1; Packing Group: III Solid Molecular Formula: C₄H₆O₂ MW: 86.09 Melting Point: 53-58° Boiling Point: 238° Flash Point: 152°C (306°F)