Denatured vs ethanol alcohol

[BobDavis88 at aol.com]

In a message dated 5/14/2006 7:30:35 AM Pacific Daylight Time, 
KeyKat88 at aol.com writes:
  Is denatured alcohol the same as Ethanol alcohol that is available in 
drugstores? ...or so I use straight stuff from the state liquor store?
Methanol = methyl alcohol = wood alcohol. Simplest of the alcohols, more 
rapid evaporation than ethanol, highly toxic.

Ethanol = ethyl alcohol = grain alcohol (distilled from sugars in fermented 
sugar cane or grain). Next more complex alcohol; the kind people drink. 
(Everclear = 95% pure grain alcohol)

Denatured alcohol = usually ethanol base, "denatured" with unpleasant tasting 
or toxic substance, often methanol, therefore avoids taxation and regulation 
of drinking alcohol. Poisonous to drink, but less immediately toxic to use 
than methanol. Otherwise, similar properties to ethanol. Available as "Shellac 
Thinner."

Rubbing alcohol = usually based on isopropyl alcohol, an isomer (structural 
variant) of the third alcohol in the chain (propanol); also often contains much 
water, perfumes, oils, etc. Generally unsuitable for piano work.

Bob Davis
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