POTASSIUM BENZOATE, F.C.C. SPECIFICATIONS DESCRIPTION: White, odorless or nearly odorless, granules or crystalline powder,Soluble in water.      FORMULA    C7H5KO2 MOLECULAR WEIGHT   160.22 ASSAY (Anhydrous basis)   99.0% - 100.5% WATER    1.5% maximum HEAVY METALS (as Pb)   10 ppm maximum ALKALINITY (as NaOH)   0.06% maximum ARSENIC (as As)   3 ppm maximum