comparitive info of desiccants> silica gel, alumina etc. (****)

silica gel The internal structure of a silica gel granule contains a vast network of inter-connecting microscopic pores, which attract and hold moisture via physical adsorption and capillary condensation. A single teaspoon of silica gel has an internal adsorptive area equivalent to a football field. Silica Gel is inert and non-toxic. Even when saturated silica gel looks and feels dry to the touch. Since the second World War, silica gel has been the desiccant of choice by government and industry.