Linear Formula: HOCH2CH(OH)CH2OH, Molecular Weight: 92.09, Synonym: 1,2,3-Propanetriol, Glycerin, for molecular biology, ≥99.0%. Glycerol is used both in sample preparation and gel formation for polyacrylamide gel electrophoresis. Glycerol (5-10%) increases the density of a sample so that the sample will layer at the bottom of a gel’s sample well. Glycerol is also used to aid in casting gradient gels and as a protein stabilizer and storage buffer component.