CAS 56-81-5 appears in our catalog under these names: Glycerol, ultrapure, Spectrophotometric Grade , Glycerol, ACS, 99.5+% , Glycerol, ultrapure, HPLC Grade , Glycerol, 99+% , Glycerol, Molecular Biology Gr . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 100ml, 1L, 4L, *4x1L, 500ml, 10000ml, 2500ml, 250ml.