Water Reactive 4 : Under the U. S. OSHA HAZCOM standard, a chemical is identified as water reactive if it reacts with water to release a gas that is either flammable or presents a health hazard
Canadian Centre for Occupational Health and Safety CCOHS, Chemicals & Materials Safety Data Sheet MSDS - An Explanation of Common Terms, Ontario, Canada 2013. http://www.ccohs.ca/oshanswers/chemicals/glossary/ msds_gloss_a.html, (Common MSDS Terms Used in Occupn Hlth and Sfty - Canad) {630}