Denatured alcohol is ethanol or alcohol that has an added toxic chemical, which makes it unsafe for humans to consume it. In most cases, 5-10% methanol is added to the alcohol to make it bad ...

Denatured alcohol is ethyl alcohol with substances added to make it unfit for human consumption. Here's how it's different from I isopropyl alcohol.

What is denatured alcohol? Denatured alcohol is ethanol that’s been mixed with toxic additives. Ethanol — also known as grain alcohol — is alcohol at its most basic.