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When is 70% isopropyl rubbing alcohol better than 91%?
I have a question about rubbing alcohol. When is 70% isopropyl rubbing alcohol better than 91%?
Generally speaking, 70% isopropyl rubbing alcohol is better if you want to use it as a disinfectant, as the water content helps to penetrate the cell walls of microorganisms. 91% isopropyl rubbing alcohol is better for some cleaning purposes, as it evaporates more quickly and leaves less residue.