Boric acid and its sodium borate salts are active ingredients of pesticide products used against insects, spiders, mites, algae, molds, fungi, and weeds. They were first registered as pesticides in the United States in 1948 and reregistered in 1993. The borate salts include sodium tetraborate decahydrate, sodium tetraborate pentahydrate, sodium tetraborate (anhydrous borax), disodium octaborate tetrahydrate, disodium octaborate (anhydrous), and sodium metaborate (1).