Boric acid is a weak Lewis acid of boron. Other names for this chemical are acidum boricum, hydrogen borate, boracic acid, and orthoboric acid. The chemical formula is H3BO3. It takes the form of white powder or clear crystals. It is soluble in boiling water. At temperatures above 170º C, it forms solid metaboric acid. Boric acid is poisonous to humans when ingested or inhaled in large doses. The MLD (LD50) dose is 2,660 mg/kg body mass. This chemical has many applications, including wide spread use as an insecticide for termites, fleas, cockroaches, and other insects. In medicine, it has a long history of use as an antiseptic. This product is also important in chemistry where it is used as a Ph buffer. In industrial production, nano-particals of boric acid are combined with oils and used as a lubricant in specialized metal and ceramic applications. It is also a main ingredient in fiberglass compounds.