A highly potent, corrosive blue chemical which dissolves the entire piece of organic material it is placed on, including Xenomorph carcasses. This substance is used to eliminate evidence of a Predator's presence, such as corpses, and can also be used as a weapon. The substance reacts violently with water. A small amount of the solvent can vaporize large quantities of water and any other material in it. In AVPR, Wolf uses it to get rid of any evidence that other world life exists. It is a strong liquid which is so strong that it can kill a Xenomorph.