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Physical & Chemical properties

Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study well documented, meets generally accepted scientific principles, acceptable for assessment
Reason / purpose for cross-reference:
reference to same study
no guideline followed
not specified
Principles of method if other than guideline:
Vapor pressure determined on a sublimed sample of p-aminophenol in an isoteniscope at temperatures from 130 to 186 degree C.
GLP compliance:
not specified
Type of method:
25 °C
Vapour pressure:
0 mm Hg
Remarks on result:
other: extrapolated from higher temperature data points

Temperature, C       pressure, mm hg

130.2                                0.3

143                                   2.3

145                                   2.2

150                                   3.0              

151.1                                3.2

157.5                                4.7

159.6                                5.1

167                                   8.0

171.1                                9.9

176.5                               14.9

186.3                               26.7

284                                 760

Vapor pressure is 4 x 10 (-5) mg Hg at 25 degree C

Description of key information

0.0053 Pa at 25C (0.00004 mm HG)

Key value for chemical safety assessment

Vapour pressure:
0.005 Pa
at the temperature of:
25 °C

Additional information

Value reported in key study in mm hg. Converted from mm Hg to Pascal which results in 0.0053 Pa.