Here's why:
* Acids and alkalis (bases) are defined by their chemical properties, specifically their ability to donate or accept protons (H+ ions).
* Solvents are substances that dissolve other substances (the solutes).
Most nail polish removers are based on acetone or ethyl acetate, which are organic solvents. They work by dissolving the polymers in nail polish, not by reacting with them in an acidic or alkaline way.
However, some nail polish removers may contain mild acids or bases as additives to improve their effectiveness or to help remove certain types of polish. These are usually present in small quantities and don't change the overall nature of the product as a solvent.