... 70% Iron(Fe):15-20PPM Useage:mining,leather,dye,water treatment,paper manufacturer Molecular formula: NaHS Molecular weight: 56 ... system crystal, easily being deliquescent, soluble in water and alcohol, water solution with strong alkaline. Reacted with acids and ... ) PPM1520--Na2CO3 % Max0.61--Insolubles In Water % Max0.0050.005-- sodium hydrosulfide for mining,leather,water treatment,paper manufacture