Organic macromolecule industry : initiator for
films ,and widely used in waste
liquid treatment.

2) Photography: as developing and fixing agents
for films,and widely used in waste liquid
treatment .
3) Metal surface treatment: etchants for printed
circuit board.
4) Textile industry: as desizing agent and
chromophoric agent for vat dyes.
5) Used in refine of ammonium persulfate