Food grade:  sodium sulfite (Na2SO3), mass fraction / ≥97%  Fe, mass fraction≤0.01%

Free alkali(as Na2SO3), mass fraction ≤0.6%  Heavy metals(as Pb), mass fraction≤0.001% As (As),

mass fraction≤0.0002%  Clarity :passed

Tech grade: sodium sulfite (Na2SO3) ≥97%  Fe ≤0.003%  water-Insoluble ≤0.02%

Free alkali(as Na2SO3) ≤0.1%  Sulfate(as Na2SO4) ≤2.5%  Chloride(as NaCl) ≤0.1%

Packing: in polythene plastic bag with a polypropylene overbag, paper-plastic composite bag, kraft bag, etc.

Net weight: 25,50,1000kilograms per bag