Silica gel is either the beaded or crystalize foam of sodium silicate which is solid then other adsorbents and can absorbs water molecules. This desiccant is a poisonous substance and it should not be ingested. Silica gel is also used to dry the air in industrial compressed, heated and heatless air systems, also use for catalyst carrier. It absorbs moisture from air, preventing damage of industrial air due to moisture or condensation.