Limnophile
New member
91% and 99% isopropanol from the drug store evaporate quickly and leave no water behind.
With regard to ethanol, the best that can be produced by distillation is 95% (190 proof) because of the ethanol-water azeotrope marine mentions. A high-tech lab is needed to produce 100% ethanol, which has applications in molecular biology (eg, preciptiation of DNA from extracts), but I suspect toxic impurities are in it. I seem to recall one way to produce it is to distill it in a mixture of benzene to defeat the ethanol-water azeotrope.
I see no reason to use expensive potable or lab-grade ethanol or cheap denatured ethanol when isopropanol is so cheap, easy to find, and doesn't seem to harm plastic. I assume even 70% isopropanol evaporates quickly enough to be harmless as long as the cleaned parts aren't stored until they are dry. With the 90+% forms the drying is quicker than you can work.
With regard to ethanol, the best that can be produced by distillation is 95% (190 proof) because of the ethanol-water azeotrope marine mentions. A high-tech lab is needed to produce 100% ethanol, which has applications in molecular biology (eg, preciptiation of DNA from extracts), but I suspect toxic impurities are in it. I seem to recall one way to produce it is to distill it in a mixture of benzene to defeat the ethanol-water azeotrope.
I see no reason to use expensive potable or lab-grade ethanol or cheap denatured ethanol when isopropanol is so cheap, easy to find, and doesn't seem to harm plastic. I assume even 70% isopropanol evaporates quickly enough to be harmless as long as the cleaned parts aren't stored until they are dry. With the 90+% forms the drying is quicker than you can work.