Purity: 85% Used: as reducing in the textile industry of dyeing,reduction cleaning,printing and bleaching and as silk. sodium hydrosulfite1, provide free sample 2, offer SGS PSI for quality Product Name: sodium hydrosulfiteCAS:7775-14-6Specification:Purity:85%Packing: 50kg/ iron drumUsage:1,Widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, textile ...