Molecular Formula: Na2S Specification: 60% CAS NO. 1313-82-2 H.S.CODE: 28301010 UN NO.:1849 YELLOW FLAKES Na2S: 60%min Water insoluble: 0.03%max Na2CO3: 1.8%max Fe: 0.0015%/0.0010%max 20/10ppm Na2S%: 60%min 60.01% Na2CO3%: 2%max 1.67% Fe%: 0.0015% max 0.002% Water insoluble%: 0.03% max 0.02% 25kg/plastice bag