Answer: dioxane

AnswerCrossword Clue
DIOXANESolvent used in varnishes
dioxanecolorless, flammable, liquid cyclic ether, C4H8O2, having a faint, pleasant odor: used chiefly in the varnish and silk industries and as a dehydrator in histology
dioxanea flammable toxic liquid diether C4H8O2 used especially as a solvent
dioxanea toxic flammable solvent, also DIOXAN