... overbag, paper-plastic composite bag, kraft bag, etc. Netweight:25,50,1000kilograms per bag or following your demand. We welcome ... powder. Quality standard:HG/T28261997 CAS 7681-57-4ItemSuperiorFirst gradeContentNa2S2O5)97.0 min94.0 minFe%<0.0050.010Insoluble substance in water0 ... , paper-plastic composite bag, kraft bag, etc. Net weght: 25,50,1000 kilograms per bag or following your demand. We ...