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I’ll throw a bit in.
Reagent grade ethanol is 200 proof, or 100%. ‘Grain” alcohol is 195 proof because of eloquensence (ability of a substance to absorb humidity from ambient air partial pressure of H2O).
That being said, I was friendly with my chem TA in colllege and would get 6 gallons of the above for $30.
It worked just fine on the people that needed it.
Reagent grade ethanol is 200 proof, or 100%. ‘Grain” alcohol is 195 proof because of eloquensence (ability of a substance to absorb humidity from ambient air partial pressure of H2O).
That being said, I was friendly with my chem TA in colllege and would get 6 gallons of the above for $30.
It worked just fine on the people that needed it.