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Sodium Metabisulfite

One of two compounds commonly used to sanitize winemaking equipment and utensils, the other being potassium metabisulfite. Its action, in water, inhibits harmful bacteria through the release of sulfur dioxide (SO2), a powerful antiseptic. It can be used for sanitizing equipment, but the U.S. government prohibits its inclusion in commercial wine and thus should not be used to sanitize the must from which wine is to be made. It is about 17.5% stronger than potassium metabisulfite and should be mixed accordingly.

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