Ammonium Bi Sulphite CHARACTERISTIC Appearance Assay as (NH4)HSO3 Specific gravity PH So2 Clear yellow solution 60.0% to 70.0% 1.39 to 1.40 4 to 5.5 38% to 45% APPLICATION oilfield chemical, caramel colour, specialty uses, photography , agro industry., special chemicals, Pharmaceutical industry, Laboratory chemicals Potassium Meta Bi Sulphite Physical appearance Assay as K2S205 Clarity of 10% solution PH of 5% solution Iron content Heavy metal(as Pb) Arsenic Selenium Water Insoluble % max White Crystalline Powder 95 %mix SPECIFICATION clear and colourless 4 – 5.5 10 ppm max 10ppm max 3 ppm max 3 ppm max 0.05% APPLICATION specialty chemicals , food Preservatives, Pharmaceutical industry, Laboratory chemicals, photography