Steve wrote: SODIUM CHLORITE FAQ
How long can you store Sodium Chlorite
With proper storage, 80% Tecnical Grade Sodium Chlorite can last over 20 years. It should be kept in a dry, dark area, with no temperature extremes.
The dry Sodium chlorite may be stored in HDPE, or galvanized steel, or stainless steel. Keep in mind this MUST be kept dry.
You can also freeze i SOdium Chlorite. At low temperatures, the shelf life is virtually indefinite.