Solid sodium metabisulfite has a typical shelf life of 4 to 6 months under cool, dry storage conditions.
SMB reacts with air and reduces to SO2 as well as being hygroscopic in the solid form. So depending on the storage conditions the ability of your SMB to reduce O2 will be reduced based on these factors.Statistics: Posted by Futur — Tue Apr 11, 2017 6:58 am
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