Nail polish. Numerous chemicals are in nail polish and the chemicals vary with the different products e.g. Nirocellulose, ethyl acetate, resins, plasticizers, solvent, coloring agents, adhesive poymers, formaldehydes, camphor, pigments, thickening agents, toluene, sylene and the list goes on and on. Anyone using nail polish should use products from companies that formulate responsibly and have a good reputation.
Numerous. You can get your answer by google.