Originally Posted by Atomicman
Originally Posted by cantunamunch
Denatured ethanol is a marginally better solvent than isopropanol, but you are absolutely correct, isopropanol works just fine. If you keep alcohols in spray bottles, the spray bottles even last longer with isopropanol :P
*shrug* I use ammonia window cleaner quite often.
The purpose of denatured is to make unpalatable.
Induces nausea! Keeps folks from drinking ethanol!
Yes, yes, but the salient part here is how they make it unpalatable.
Let's say they add diethyl phthalate http://en.wikipedia.org/wiki/Diethyl_phthalate That is a solvent in itself and will eat through the nozzle hardware of a spray bottle. For equivalent concentrations, thus denatured ethanol will be a better solvent than isopropanol.
Let's say they add methanol. Again that is a solvent in itself and will eat through rubber seals, not to mention will oxidise Al faster. For equivalent concentrations, thus denatured ethanol will be a better solvent than isopropanol.
I could go on through tert-butanol, chloroform, methyl isobutyl ketone and so forth but you get the idea. Denaturants tend to be solvents and tend to attack the materials used to make spray bottles. For "tend to be" read: 'any you are likely to buy'. Hence my post and the way it was phrased.
Edited by cantunamunch - 2/19/15 at 8:13pm
You might get lucky and get isopropanol itself as a denaturant in your denatured ethanol. Unless you're buying from a medical or pharmaceutical supplier the chances of your denatured ethanol being denatured with something relatively inert like chlorhexidine are well, small verging on tiny.