Originally Posted by dwp425:
True, denatured alcohol does not have water in it ... but denatured alcohol is significantly different. It it ethyl alcohol (2 carbon atoms) rather than isopropyl alcohol (3 carbon atoms). Further, it is "denatured" with a few percent of other alcohols or solvents to render it undrinkable.
Ethanol and denatured ethanol both contain water, Ethanol when distilled forms a positive azeotrope and contains at least 4.73% water by weight.
Isopropyl alcohol also forms an azeotope with water.
