Jerry wrote:
Most rubbing alcohol is isopropyl alcohol but it can also be denatured
alcohol (ethanol with some bitter substance added to decrease the chances of
it being drunk). I am not aware of any rubbing alcohol having methanol.
Methanol is very toxic - causes blindness and death. Methanol is commonly
used as an antifreeze in windshield washer fluid (note the poison labels).


Unfortunately the additives used to denature ethanol are
not merely bitter, they are toxic, typically methanol,
or ketones. At one time sulphuric acid was used.

Ethanol denatured with methanol is sometimes still used as
rubbing alcohol. I have some at home. (google for 'surgical spirits')

But you are right, typical rubbing alcohol is 70% isopropynol
with the balance being water.

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FF