In some food industry uses as processing aid as defined by article 3 of Regulation EU 1333/2008.
In sugar industry to assure sterile conditions in diffusion and to decolorise thin juices.
In water desalting plants with reverse osmosis for removing the excess of chlorine and for membrane preservation.
In drinking water treatment, in order to remove the excess of chlorine.
In starch production as bacteriostatic.