1,4-Diiodobutane 1,4-Diodobutane 4-01-00-00276 (Beilstein Handbook Reference) 628-21-7 BRN 1098276 BUTANE, 1,4-DIIODO- EINECS 211-032-1 NSC 31721 Tetramethylene diiodide Tetramethylene iodide