ChromegaChiral CCU is a modified amylose coated on high purity, high performance spherical silica particles. The chemical modification includes the combination of chemical bonding groups of methylbenzylcarbamate and 3-chloro-4 methylphenylcarbamate attached to amylose. This combination of bonded groups stabilizes the solubility of coated phase making for a durable phase similar to other widely used coated phases. The use of amylose modified with phenyl groups provides for the separation for many previously unresolved/poorly resolved chiral mixtures.