Vinegar is a sour liquid used as a condiment or as a preservative. It is obtained through the fermentation, or the artificial oxidation, of ethanol.[1]

According to an alchemical work dating back to the 1550s, vinegar is used in the making of the perfect medicine, along with Salt, Urine, Sal Ammoniac and a particular Sulphur Vive.[2][3]

Turning vinegar back into wine (and thus reverting the fermentation/oxidation process) is part of the sixth year Charms curriculum at Hogwarts School of Witchcraft and Wizardry.[4]

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