1,1'-Oxybispropane 111-43-3 4-Oxaheptane Di-n-propyl ether Di-n-propyl ether [UN2384] [Flammable liquid] Dipropyl ether Dipropyl oxide EINECS 203-869-6 Ether, di-n-propyl- HSDB 5163 PROPYL ETHER Propane, 1,1'-oxybis- UN2384 n-Propyl ether