Potassium Sorbate Specification: FCC IV Assay (dry basis)% 98.0-101.0 Acidity(as sobic acid) Passes test (about 1%) Free alkall (as K2CO3)% Passes test (about 1%) Loss on drying % 1Max Heavy metals (as Pb)% 0.001Max Clarity --- Aldehyde (as HCHO)% --- Chloride (as Cl)% 0.018Max Arsenic % --- Sulfate (as SO4)% --- Packed with carton, the net weight of each is 10kg or 25kg