Ethyl alcohol – Ethanol Alcohol of alcoholic beverages – Also called grain alcohol – Often made by the fermentation of grains Also potentially toxic – ~200 ml (pure) ethanol can be fatal – Comment on denatured alcohol at some point Metabolized by the liver enzyme alcohol dehydrogenase – Ethanol  acetaldehyde  acetic acid – Metabolites are less toxic than those of methanol – Acetaldehyde is responsible for most of the hangover symptoms dehydration also contributes to symptoms