Test Item Standard Request. Results of Test Individual Result
Appearance White or light yellow
crystalline powder Meet the demand Pass
Content (Na2S2O5%) ≥95% 97.56% Pass
SO2% ≥65% 65.76% Pass
Fe% ≤0.005% 0.002% Pass
Insoluble substance
in water% ≤0.05% 0.01% Pass
Heavy metal (Pb)% ≤0.002% 0.001% Pass
As% ≤0.0002% 0.0001% Pass
PH 4.0-4.6 4.4 Pass
Conclusion Qualified
Appearance White or light yellow
crystalline powder Meet the demand Pass
Content (Na2S2O5%) ≥95% 97.56% Pass
SO2% ≥65% 65.76% Pass
Fe% ≤0.005% 0.002% Pass
Insoluble substance
in water% ≤0.05% 0.01% Pass
Heavy metal (Pb)% ≤0.002% 0.001% Pass
As% ≤0.0002% 0.0001% Pass
PH 4.0-4.6 4.4 Pass
Conclusion Qualified
Main Products
sodium metabisulfite, Xanthan Gum, potassium sorbate, soda ash,