In food industry as additive (E223) preservative, antioxidant and antimicrobic for fruits (dried, glazed and
candled), vegetables (onions, potatoes, etc.), juices (citrus and grapes) and fish (shrimps and prawns).
In silage treatment as antifermentative.
In starch and sweeteners production as bacteriostatic.
In the photographic industry as component of developer bath.
In desalting plants with reverse osmosis (for removing the excess of chlorine and for membrane preservation) or in drinking water treatment (to remove the excess of chlorine).
In chemical synthesis in the production of acrylic fibres, vitamin K and A, pharmaceutical intermediates, etc