It is an important sulphide of sodium.  It is widely used in leather industry for removing hairs from the hide.   It finds extensive applications in textile and also synthetics of sulphur dyes and reduction of amino compounds.  It is also used in  paper industry, lothogrraphy and engraving manufacture of sulphur black dyes etc.

There was no production of sodium sulphide in India before the   war,   all the  requirements  being  met   from   imports.  Arrangements  for  the  import  of  sodium  sulphide  failed  and considerably  difficulty  was  experienced  by  the  textile  and terming  industries in meeting the requirements of  the  defense serious   for textiles and leather.  The question  of  developing the  sodium  sulphide  industry in India became  urgent  and  was immediately  taken  up.   Shortly  before  that  time   extensive deposits  of  sodium  sulphate  from  which  sodium  sulphide  is manufactured.   The  smaller  producers  either  obtained  sodium sulphate  which left over as a by-product in the  manufacture  of bichromates or hydrochloric and nitric acids or Rayon industries, as  in most foreign countries.  There was no control over either production of sodium sulphide or its distribution or its price during war time.

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