Items Quality Index Food Grade Industry Grade Purity (As Na2S2O5) 98.0% min 96.0% min Sulfur Dioxide(SO2) 65.0% min 65.0% min Arsenic (As) 0.0002% max - Heavy metals (As Pb) 0.0…
Items Quality Index Food Grade Industry Grade Purity (As Na2S2O5) 98.0% min 96.0% min Sulfur Dioxide(SO2) 65.0% min 65.0% min Arsenic (As) 0.0002% max - Heavy metals (As Pb) 0.0005% max - Selenium (Se) 0.0005% max - Iron (Fe) 0.001% max 0.002% max Water insolubl
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