sodium sulfite
It is a product of sulfur dioxide scrubbing, a part of the flue-gas
desulfurization process. It is also used as a preservative to
prevent dried fruit from discoloring, and for preserving meats, and
is used in the same way as sodium thiosulfate to convert elemental
halogens to their respective hydrohalic acids, in photography and
for reducing chlorine levels in *
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