Also Called: Distillates (coal tar), upper, fluorene rich [Wash oil redistillate];Distillates (coal tar), upper, fluorene-rich;Wash Oil Redistillate;[A complex combination of hydrocarbons obtained by the crystallization of tar oil. It consists af aromatic and polycyclic hydrocarbons primarily fluorene and some acenaphthene.];Wash oil redistillate (A complex combination of hydro carbons obtained by the crystalli sation of tar oil. It consists of aromatic and polycyclic hydro carbons primarily fluorene and some acenaphthene.)