CAS: 557-20-0 EC No: 209-161-3 MDL No: MFCD00009021 UN No: UN3394; Haz Class: 4.2 (4.3); Packing Group: I Liquid Linear Formula: (CH₃CH₂)₂Zn MW: 123.49 Flash Point: -40°C (-40°F) Density (g/mL): 0.720