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PROBLEM TO BE SOLVED : To provide silica sol dispersed in an organic solvent which inhibits the change of properties or decomposition, etc., of a resin with time and the decomposition and the discoloring of an organic solvent of a dispersion medium. SOLUTION : The silica sol dispersed in an organic solvent contains colloidal silica particles on the surfaces of which alkaline earth metal ions are bonded. COPYRIGHT : (C)2007, JPO&INPIT