... double inner polybagsApplication:1, widely used in textile industry for vat dyeing , reduction cleaning, printing and stripping , textile bleaching .2, it is used in bleaching paper pulps, expecially ... of thiourea and other sulphides5 it is used as reducing agent in chemical industry.6, sodium hrdrosulfite food additive grade is used in foodstuffs, as bleaching agent andpreservative in dried fruits ...