4 oz of Activated Charcoal Powder, packaged in a resealable bag. Activated Charcoal is used as a purifier. It is highly proficient at removing color, flavor, and odor compounds from liquids such as juice, wine, and sweeteners. Starwest's Activated Charcoal is made from sawdust and therefore is a renewable resource. As a wood-based activated carbon, it is highly adsorbent due to the particles' large surface area and high volume of pores compared to activated charcoal produced from other, non-wood materials. In fact, wood-based carbon has twice the pore volume as carbon created from coal, lignite, and coconut. As a result, high purification happens in a shorter time while using less carbon. This Activated Charcoal is food-grade quality and is considered to be GRAS (generally regarded as safe in food processing).