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potassium metabisulfite

   Also found in: Wikipedia 0.01 sec.
potassium metabisulfite [pə′tas·ē·əm ‚med·ə·bī′səl‚fīt]
(inorganic chemistry)
K2S2O5White granules or powder, decomposing at 150-190°C; used as an antiseptic, for winemaking, food preservation, and process engraving, and as a source for sulfurous acid. Also known as potassium pyrosulfite.


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Six chemicals can be used: sulfur dioxide, sodium sulfite, sodium bisulfite, potassium bisulfite, sodium metabisulfite and potassium metabisulfite.
FDA to ban sulfites from fresh produce by Raloff, Janet / Science News
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