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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1991-09-12 - 1991-11-21 (experimental phase)
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Principles of method if other than guideline:
Automatized gas saturation method with online GC detection.
GLP compliance:
yes
Type of method:
gas saturation method
Temp.:
80.5 °C
Vapour pressure:
0.018 Pa
Remarks on result:
other: average of 4 experimental determinations
Temp.:
100.6 °C
Vapour pressure:
0.157 Pa
Remarks on result:
other: average of 4 experimental determinations
Temp.:
185.9 °C
Vapour pressure:
54.4 Pa
Remarks on result:
other: average of 4 experimental determinations
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: calculated from vapour pressure curve for solid substance (extrapolated)
Transition / decomposition:
no

Vapour pressure curve for the liquid substance (i.e. above ca. 69 °C):

log10 P[Pa] = 13.371 - 5300.30 * 1 / T[K]

Vapour pressure curve for the solid substance (i.e. below ca. 69 °C; by extrapolation):

log10 P[Pa] = 19.2385 - 7308.76 * 1 / T[K]

Enthalpy of fusion: 38.45 kJ/mol

Melting point: 69.2 °C

Conclusions:
The study is considered to be adequate and reliable.
Executive summary:

Vapour pressure at 25 °C : 5.31 x 10-6 Pa (extrapolated)

Vapour pressure curve for the solid substance (extrapolated): log10 P[Pa] = 19.2385 - 7308.76 x 1 / T[K]

Description of key information

Vapour pressure (Rordorf, 25°C): 0.00000531 Pa

Key value for chemical safety assessment

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

Additional information

A guideline study is available which is considered to be reliable and adequate, and is carried forward for use in risk assessment, classification and labelling. The parameters of the vapour pressure curve are given in the endpoint study record.