1,4-Dichloro-2,3-epoxybutane 1,4-Dichlorobutene 2,3-epoxide 3583-47-9 Butane, 1,4-dichloro-2,3-epoxy- Butane,1,4-dichloro-2,3-epoxy- NSC8802 Oxirane, 2,3-bis(chloromethyl)- WLN: T3OTJ B1G C1G