YMC-Pack Diol is a size exclusion chromatography column packed with dihydroxypropyl-bonded silica. Diol-120, 200, and 300 are suitable for separation or molecular weight determination of proteins with molecular weights of 1,000 to 1,000,000. Diol-60 is suitable for separation of peptides or oligosaccharides whose molecular weights are below 10,000.