Sodium HydrosulfiteSynonym: Sodium DithioniteFormula: Na2S2O4CAS NO.: 7775-14-6 Grade: jisx 1476-1985 (Japan) and hg2074-91 (china)Description: white crystal powder. Easily soluble in water, and insoluble in alcohol. It is strongly reducing agent.Specifications: itemzc90zc88zc85na2s2o490%min.88%min.85%min.water insoluble0.1%max.0.15%max.0.1%max.store time 10month12month12monthPacking: packed in 50kgs iron drum with double deck plastic bag. UN No.: 1384 Class: 4.2