CAS: 111-30-8 EC No: 203-856-5 MDL No: MFCD00007025 RTECS: MA2450000 UN No: UN2922; Haz Class: 8 (6.1); Packing Group: III Liquid Molecular Formula: C₅H₈O₂ MW: 100.12 Density (g/mL): 1.106