Specification :

sodium metabisulfite Na2S2O5
(1)Molecular formula: Na2S2O5
(2) Physical appearance: white or yellow crystalline powder or small crystal
(3)Purity(Na2S2O5): 96.5% min
(4)Content of SO2: 65%
(5)Main use: Dyeing mordant; antichlor fabric after bleaching; food preservativesreducing agent and sulfonating agent in chemical, medicine industry; bleaching agent for bamboo, wood, paper fiber; non-ferrous metal ore-dressing agent; waste water treatment agent and rubber coagulator
(6) Packing: Plastic woven bag internal with paper
(7)Net weight: 25kg /bag
(8)specification:
Main content (Na2s2o5) >= 96.5%;
SO2 >= 65.1%
Content of iron (Fe) >=0.005%
heavy metal( in pb)