Refined Glycerine USP - Specifications (TDS) Glycerol content % 99.7 min Specific Gravity (25 Deg C/25 Deg C) 1.249 min Colour (ml FeCl3 /50ml) 0.4 max Chloride content, ppm 10 max Chlorinated Compounds, ppm 30 max Heavy Metals, ppm 5 max Moisture % 0.2 max Fatty Acid and Ester (ml/0.5N NaOH) 1 max Sulphate content, ppm 20 max Organic volatile impurities % 1 max Residue on ignition % 0.01 max Identification IR, GC Deg and related compounds Passes