trans-2-Pentene Other names: (E)-2-Pentene 2-trans-Pentene 2-Pentene, trans- Pentene-2, trans- trans-pent-2-ene Formula: C5H10 CAS: 646-04-8 Weight: 70,1329 g/mol Boiling point: 37 °C Melting point: -140 °C Density: 0,649 g/cm3