The Smile! book had a section on oral care products.
Here’s what it said about mouthwash:
Some mouthwashs contain phenols-types of alcohol (including Listerine) which are considered toxic because they are susceptible to being absorbed by lungs and skin, resulting in caustic burns, as well as kidney and liver damage and hyperactivity.
So, while you wear braces, it’s recommended you use a flouride rinse. PLEASE consider one without alcohol, for your health!!!!