Product name	sodium hydrosulfite 85%,88%,90%
CAS No.
Molecular Structure
Uasage
INDEX 90% 88% 85% Na2S2O4 ≥90% ≥88% ≥85% Fe ≤20ppm ≤20ppm ≤20ppm Zinc（Zn） ≤1ppm ≤1ppm ≤1ppm Other heavy metal （calculated as Pb） ≤1ppm ≤1ppm ≤1ppm Water Insolubles ≤0.05% ≤0.05% ≤0.05% Shelf Life(month) 12 12 12

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