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Pulp and paper
In the production of pulp by sulphite semi-chemical process and chemi-thermo mechanical means
Water treatment
As an antichlor
Boiler water
As an oxygen scavenger
Chemicals and drugs
A moderate reducing agent in the manufacture of sodium thiosulphate, sulphonated chemicals, sulphomethylation, and acetaminophen
Natural latex rubber
As a preservative
Photography
As a preservative
Food industry
As an antioxidant, enzyme inhibitor and anti-microbial agent
Fibre industry
As a solvent for raw materials, an additive for precipitation baths, for bleaching and for desulphurising bobbins
Chlor-alkali
To destroy chlorine in return brine
Leather industry
In the sulphitisation of tanning extract
Explosives
In the production of trinitrotoluene (TNT)
Minerals
Oil well floatation as an oxygen scavenger
Detergents
In the manufacture of sulphosuccinates and shampoo
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