Sodium Bisulfite Solution 40% tends to yellow when stored
or handled in equipment constructed of ordinary iron or
steel. Lead, type 316-L stainless steel, polyethylene, and
fiberglass can be used safely to store Sodium Bisulfite
Solution 40%.
Polyester tanks and piping are resistant to 220°F and highdensity
polyethylene is resistant to 140°F. For piping,
polyvinyl chloride has been successfully used up to 140°F.
Under normal storage conditions, the oxidation loss of a
solution of Sodium Bisulfite should be about 3% per year.
Suggested storage temperature of containers at or above
50°F. DO NOT FREEZE.