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SGL is a granular activated carbon which is made to purify or decolorize many aquous and organic liquids. SGL is made from selected bituminous coal to give superior hardness, high abrasion resistance and long life. This carbon has a high pore volume and a moderately large surface area. Its pore structure has been selected for adsorbtion of high and low molecular weight substances. Each granule of SGL is permeated by a system of large macro pores which serve as avenues for rapid diffusion of adsorbed materials to pore areas. This enhances both adsorption and reactivation. This grade of carbon is ideal for column operation.