Sodium hydrosulfite is used in textile industry for vat dyeing, reduction cleaning, printing and stripping, also used in bleaching paper pulps, especially mechanical pulp, bleaching kaolin clay and food stuffs. Specification: 85%, 88% and 90% Packing:50kg iron drums with double inner plastic bags We are the biggest manufacturer of sodium hydrosulfite in Northern China. We can supply sodium hydrosulfite 85%, 88% and 90% packed in 50kgs or 100kgs blue iron drums. If you are interested in our products, please contact me without hesitate!