Vapor 19 : Chemistry and Chemical Disasters. The state of a substance that exists below its critical temperature and that may be liquefied by application of sufficient pressure
National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), The Emergency Response Safety and Health Database, Atlanta, GA, USA 2014. http://www.cdc.gov/NIOSH/ershdb/glossary.html#B, (Emr Resp Sfty and Hlth Database - Amer) {794}