Wikipedia
Lactonitrile
Lactonitrile is a chemical compound used as a solvent and as an intermediate in the industrial production of ethyl lactate and lactic acid. It is the cyanohydrin derived from acetaldehyde.
It 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.