It is mainly used as fixing agent in photographic industry. Secondly, it is used as reductant of dichromate, neutralizer of nitrogen containing tail gas, mordant, bleaching agent of wheat stalk and wool, and dechlorination agent of pulp bleaching. It is also used in the manufacture of tetraethyl lead, dye intermediates and silver extraction from ores,watertreatment,aquaculture(fishing farm),Stainless steel made by steel factory.
Specification
Appearance
crystal granualr
NA2S2O3•5H2O
99%
Water Insoluble Matter
Max 0.03%
PH value
6.5-9.1
NA2S
Max 0.001%
Fe
Max 0.002%