Bitoscanate is a tasteless, odorless, colorless, needle-like crystalline solid material prepared from mustard powder acid and used as an anthelmintic against nematodes, especially hookworms (Necator sp.) and Ancylostoma duodenale. Side effects reported with therapeutic use have been nausea, vomiting, diarrhea, abdominal pain or discomfort, loss of appetite, dizziness or giddiness, vertigo, weakness, headache, and an itching sensation over the body. Such side effects have most often been mild and required no treatment. Bitoscanate is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.