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Vapour pressure

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Description of key information

Several independant sources indicate that the vapour pressure is 3905 kPa at 25°C and

4080 kPa at 20°C.

Key value for chemical safety assessment

Vapour pressure:
3 905 kPa
at the temperature of:
25 °C

Additional information

Different reliable sources indicate the following results for phosphine :

  • 4080 kPa at 20°C (source: INRS)
  • 3295 kPa at 22°C(source: Biocidal assessment report of aluminium phosphide)
  • 3905 kPa at at 25°C(source: HSDB on the base of Daubert)

Note: Vapour pressure testing is also not required for chemicals with a standard boiling point of < 30°C as these substances will have vapour pressures above the limit of measurement (i.e. 105Pa), which is the case of phosphine