Question

What is denatured alcohol

Answer 1

Denatured alcohol is ethanol (ethyl alcohol) made unfit for human consumption by adding one or more chemicals (denaturants) to it. Denaturing refers to removing a property from the alcohol (being able to drink it), not to chemically altering or decomposing it, so denatured alcohol contains ordinary ethyl alcohol.
Why Is Alcohol Denatured?
Why take a pure product and make it toxic? Basically, it's because alcohol is regulated and taxed by many governments.
Pure alcohol, if it was used in household products, would offer a much less expensive and readily available source of ethanol for drinking. If alcohol wasn't denatured, people would drink it.