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It
is primarily used in pulp and paper industry. It is used in water treatment
as an oxygen scavenger agent , in the photographic industry to protect
developer solutions from oxidation, in textile industry as a bleaching,
as a desulfurizing and as a dechlorinating agent and in leather trade for
the sulfitization of tanning extracts. It is used in chemical
manufacturing as a sulfonation and sulfomethylation agent. It is used in
the production of sodium thiosulfate. It is use in other applications
include ore flotation, oil recovery, food preservative, making dyes, and
detergent. It is mainly used in medicine, tannage and tanning.
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