What is the main ingredient in most nail polish removers?

The primary ingredient in most nail polish removers is acetone. Acetone is a powerful solvent that effectively breaks down the resins and other compounds found in nail polish, allowing for easy removal. Its strong properties enable it to dissolve even stubborn formulas, making it the preferred choice for many brands of nail polish remover.

While other substances like alcohol can also be used in nail polish removers, acetone is generally more effective and quicker in the removal process. Water and glycerin, on the other hand, do not possess the solvent properties needed to effectively break down nail polish, which is why they are not typically used as main ingredients in commercial removers.