Propyl, ethyl, methyl, and GRAIN are all types of alcohol. Propyl alcohol is a colorless, flammable chemical compound with a strong odor. It is used in antifreeze, as a solvent, and as a fuel additive. Ethyl alcohol is the type of alcohol found in alcoholic beverages and is also known as ethanol. Methyl alcohol, also known as methanol, is a toxic substance that is used as a fuel, solvent, and antifreeze. GRAIN alcohol is a clear liquid made from grains such as corn, barley, rye, or wheat. It is also known as ethanol and is used in alcoholic beverages.