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Vinegar is a liquid consisting mainly of acetic acid (CH 3 COOH) and water. The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria.Vinegar is now mainly used as a cooking ingredient.Historically, as the most easily available mild acid, it had a great variety of industrial, medical and domestic uses, some of which (such as its use as a general household cleanser) are still promoted today.he term distilled vinegar is something of a misnomer, because it is not produced by distillation but by fermentation of distilled alcohol. The fermentate is diluted to produce a colorless solution of 5% to 8% acetic acid in water, with a pH of about 2.4.
Vinegar is a naturally-occurring liquid that contains many chemicals. It is approximately 5-20% acetic acid in water. So, there are actually two main chemical formulas involved. The molecular formula for water is H2O. The structural formula for acetic acid is CH3COOH. Vinegar is considered a type of weak acid. The other chemicals in vinegar depend on its source. Vinegar is made from the fermentation of ethanol (grain alcohol) by bacteria from the family Acetobacteraceae. Many types of vinegar include added flavorings, such as sugar, malt, or caramel. Apple cider vinegar is made from fermented apple juice, beer cider from beer, cane vinegar from sugar cane, and balsamic vinegar comes from white Trebbiano grapes with a final step of storage in special wooden casks. Many other types of vinegar are available. Distilled vinegar isn't actually distilled.