Refined & Crude Glycerine 99.5% Refined and Crude Glycerine 99.5% Food Grade Raw Crude/Refined Glycerine Oil Suppliers Price Refined Glycerine is useful in a variety of applications, glycerol is used as a solvent, plasticizer and humectant. In polyacrylamide gel electrophoresis, glycerol is used in sample preparation and gel formation. At a concentration of 5-10%, glycerol is used to increase the density of a sample so that it will layer at the bottom of a sample well. Additional uses include as an aid in casting gradient gels, a protein stabilizer and storage buffer component. Item Standard Purity % 99.5 Moisture 0.13 Relative Density 20C (g/cm³) 1.035-1.039 Color(APHA) 5 Distillation (95%) C 184-190 Refractive Index 1.431-1.433 Residue on ignition % 0.008 Sulfate(mg/kg)% 0.006 Chloride(mg/kg)% 0.007