The chemical properties of silica sand is the same as silica gel. The only difference is size of silica sand is slightly smaller than silica gel. Silica sand has diametrer of 0.1- 0.7 mm. Silica sand is available in porous, granular, and amorphous from, synthetically manufactured from the chemical reaction between sulfuric acid and sodium silicate. The internal structure of Silica sand is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons and other chemicals by the phenomena known as physical adsorption and capillary condensation.