Acetic acid is the chemical compound responsible for the characteristic odor and sour taste of vinegar.
Typically, vinegar is about 4 to 8% acetic acid. As the defining ingredient of vinegar, acetic acid has been produced
and used by humans since before the dawn of recorded history. In fact, its name comes from the Latin for vinegar,
acetum. Vinegar is formed from dilute solutions of alcohol, such as wine, by the action of certain bacteria in the
presence of oxygen. These bacteria require oxygen, and the overall chemical change is the reaction of ethanol with
oxygen to form acetic acid and water.