Quick Answers
Is cloudy cider vinegar safe to use for pickling?
Vinegar, especially cider or wine vinegar, may become
cloudy and dark when stored. Cloudiness occurs when iron
in the vinegar combines with tannins, which are
responsible for the astringent flavor of many fruits
including apples and grapes. The reaction is more likely
to occur if the vinegar is stored in clear glass bottles
exposed to light. Vinegar containing the same level of
iron but stored in the dark may not become cloudy.
Cloudiness is harmless. Since acidity is not affected,
cloudy vinegar may be used for pickling.
Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia
Last update: Tuesday, May 05, 2009
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