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07-12-2014, 07:07 PM #22
One website reports that naphtha is sometimes added to denatured alcohol:
What Is Denatured Alcohol?
"I've been asked that question often, so here's the answer: Denatured alcohol is ethanol (ethyl alcohol) that has been made unfit for human consumption by adding another chemical to it. Denaturing refers to removing a property from the alcohol (being able to drink it), not to chemically altering or decomposing it.
There are hundreds of ways ethanol is denatured. Denatured alcohol that is intended for use as a fuel or solvent typically contains 5% or more methanol. Methanol is flammable and has a boiling point close to that of ethanol. Methanol is absorbed across the skin and is highly toxic, so when I recommend people not use denatured alcohol for making perfume or bath products, my reason is that you usually don't know what has been added to the ethanol. Denatured alcohol for use in cosmetics often contains water and a bittering agent (Bitrex or Aversion which are denatonium benzoate or denatonium saccharide), but other chemicals are sometimes used. Other common additives include (but are not limited to) isopropanol, methyl ethyl ketone, methyl isobutyl ketone, pyridine, benzene, diethyl phthalate, and naphtha. In some countries, denatured alcohol must be colored blue or purple using an aniline dye, in order to distinguish it from consumption-grade ethanol."
Wikipedia says that "rectified spirits" are in fact alcohol:
Ethanol - Wikipedia, the free encyclopedia
"Rectified spirits
Rectified spirit, an azeotropic composition of 96% ethanol containing 4% water, is used instead of anhydrous ethanol for various purposes. Wine spirits are about 94% ethanol (188 proof). The impurities are different from those in 95% (190 proof) laboratory ethanol.[91]"Last edited by carrolljc; 07-12-2014 at 07:12 PM.