Depilatory for hides and skins, manufacture of rubber, sulphur dyes, rayon (denitrating) , paperpulp, ore floatation, metal refining, engraving, cotton printing, as chemical intermediates and laboratory reagent. 

1.In dye industry to produce sulfer dye stuff, sulfide green, blue or dye intermediates reductant mordant etc. 

2.Used in non-ferrous metallurgical industry, ore flotation agent.

3.Used in leather-making industry as depilatory cream for raw hides.

4.Used in paper making industry as pulp blending and cooking agent.

5.Used in producing sodium thiosulphate, sodium polysulphide and sodium hydrosulphide.