... 3. ISO9001:2000 4.Quick Shipment Product Name: sodium hydrosulphite 88%Specifications:ItemsIndexTech GradeFood GradeNa2S2O4, % ≥85889085Fe, ppm ≤202020---Zn, ppm ≤1111As ... . Widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, textile textile bleaching .2. It is also used ... , liquid glucose, bamboo shoots, mushrooms and canned mushrooms. sodium hydrosulphite 88%