Acids in wine responsible for the sour taste of vinegar. During fermentation, activity by yeast cells naturally produces a small amount of acetic acid. If the wine is exposed to oxygen, "Acetobacter" bacteria will convert the ethanol into acetic acid. This process is known as the “acetification” of wine and is the primary process behind wine degradation into vinegar. An excessive amount of acetic acid is also considered a wine fault. A taster's sensitivity to acetic acid will vary, but most people can detect excessive amounts at around 600 mg/l. Ascorbic acid, also known as vitamin C, is found in young wine grapes
French wine Aligoté, and other grape varieties will also be found occasionally. Gustave Henri Laly, a renowned wine producer from Burgundy, supplied the French General Assembly with his Montrachet produced at Mont Dardon around the turn of the 20th century. Champagne, situated in eastern France, close to Belgium and Luxembourg, is the coldest of France's major wine regions and home to its major sparkling wine. Champagne wines can be both white and rosé. A small amount of still wine is produced in Champagne using (as AOC Coteaux Champenois) of which some can be red wine. Corsica is an island in the Mediterranean