Comment by spqr0a1

In case anyone is wondered why there is benzene in hand sanitizer: Ethanol forms an azeotrope with water, which makes it impossible to dry completely without further processing. Benzene forms its own azeotrope with water at an even lower boiling point which allows for cheaply drying ethanol by further distillation; With the, in this case inconvenient, side effect of residual benzene contamination. Now you don't actually need dry ethanol for hand sanitizer, but the production capacity for fuel-grade ethanol is way larger than pharmaceutical or food grade.