Animal charcoal, also known as bone black or bone char, is often used in filtration processes to remove impurities from liquids. This substance is produced by burning bones in a low-oxygen environment, creating a porous and highly absorbent material. However, there are alternative names for animal charcoal depending on the source material and specific manufacturing process. For example, if made from coconut shells, it may be referred to as coconut charcoal. Similarly, if the bones used are from cattle specifically, it may be called cattle bone char. Other synonyms for animal charcoal include bone ash, bone carbon and bone coke.