acid tartrate

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ac·id tar·trate

a salt of tartaric acid that contains an acid group still capable of combining with a base; for example, bitartrate.
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References in periodicals archive ?
juice and new wine often exist in a weird state that allows more tartrate ions (|T.sup.-~) and potassium ions (|K.sup.+~) to exist together in solution than can be allowed by the insolubility of potassium acid tartrate!
Chilling removes potassium acid tartrate and this also slightly reduces the acid taste; however, for stability in the bottle and for adding complexity of flavor, we at Cribari still feel that MLF has a place in some wines, particularly those from northern California, the north West and north East.