Abstract: The present invention relates to biologically active compounds, particularly liquid compounds, which are immobilized on a solid carrier material, particularly on mesoporous silica. The compounds are non-covalently supported on the solid carrier material thereby forming stable, easily handled solids which have the further advantage that the adsorbed biologically active compounds have improved thermal stability compared with the non-adsorbed compounds, and that they are released rapidly and completely from the carrier material when placed in an aqueous environment.