Immediately dangerous to life or health at concentrations in the ppm range. Cyanide salts are an example of an acutely toxic substance
University of Maine, Department of Chemistry, Glossary of Safety Terms and Acronyms, Orono, ME, USA 2009. http://www.business.govt.nz/worksafe/tools-resourc es/glossary-of-terms-and-acronyms/a-to-b, (ChemSfty - Amer) {503}