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Physical & Chemical properties

Boiling point

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Description of key information

The data requirement is waived, but the discussion enables to conclude that the boiling point is <= -191°C at 1 atm.

Key value for chemical safety assessment

Additional information

Since the substance is a gas made at ~97% of the following three constituents, it can be deduced that its boiling point is <= -191°C at 1 atm:

  • Carbon monoxide: -191.5 °C at 1 atm from two sources (Air Liquide. Gas Encyclopedia - CO. Available on-line at http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=45, consulted 05/20/2016) (Lide, D.R. CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL, 2007, p. 3-88).
  • Hydrogen: -252.8°C at 1 atm from two sources (Air Liquide. Gas Encyclopedia - H2. Available on-line at http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=36, consulted 05/20/2016) (Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 821).
  • Nitrogen: -195.8°C at 1 atm from two sources (Air Liquide. Gas Encyclopedia - N2. Available on-line at http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=5, consulted 05/20/2016) (O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1228).