Acetone is the name of the chemical in nail polish remover. It is organic due to the fact that it has both Carbon and Hydrogen atoms in its formula. Its formula is (CH3)2CO. It is produced by the body naturally in metabolic pathways. Acetone is used as paint thinner and as a cleaner. Acetone is colorless and flammable as well as miscible with water. Acetone is a chemical known as a ketone. The second reference link has an excellent picture of the structural formula of acetone.