We all know that items like lighter fluid, paint and chemical insecticides are considered household hazardous waste and should never be thrown in the regular trash. But did you know there are some common personal care products that are also considered hazardous? Items like nail polish, nail polish remover and even hair care products found in aerosol cans are hazardous. The one thing these beauty products have in common is they contain ingredients that are flammable, which is what makes them hazardous waste. Dispose of these unused personal care products whenever hazardous material is collected, or use it up and look for more natural and organic brands when you restock.