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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Information from handbook
Qualifier:
no guideline followed
Principles of method if other than guideline:
No data was provided within the handbook regarding type of test method.
GLP compliance:
no
Type of method:
other: no data provided
Temp.:
87 °C
Vapour pressure:
133 Pa
Remarks on result:
other: Reported as 1 mmHg @ 87.0ºC
Temp.:
117.4 °C
Vapour pressure:
667 Pa
Remarks on result:
other: Reported as 5 mmHg @ 117.4ºC
Temp.:
132 °C
Vapour pressure:
1 333 Pa
Remarks on result:
other: Reported as 10 mmHg @ 132.0ºC
Temp.:
148 °C
Vapour pressure:
2 666 Pa
Remarks on result:
other: Reported as 20 mmHg @ 148.0ºC
Temp.:
165.7 °C
Vapour pressure:
5 333 Pa
Remarks on result:
other: Reported as 40 mmHg @ 165.7ºC
Temp.:
177 °C
Vapour pressure:
7 999 Pa
Remarks on result:
other: Reported as 60 mmHg @ 177.0ºC
Temp.:
191.7 °C
Vapour pressure:
13 332 Pa
Remarks on result:
other: Reported as 100 mmHg @ 191.7ºC
Temp.:
214.3 °C
Vapour pressure:
26 664 Pa
Remarks on result:
other: Reported as 200 mmHg @ 214.3ºC
Temp.:
238.5 °C
Vapour pressure:
53 329 Pa
Remarks on result:
other: Reported as 400 mmHg @ 238.5ºC
Temp.:
263 °C
Vapour pressure:
101 325 Pa
Remarks on result:
other: Reported as 760 mmHg @ 263.0ºC
Conclusions:
The vapor pressure is 1 mmHg at 87.0°C and 760 mmHg at 263.0ºC.
Executive summary:

The handbook reports that the vapor pressure is 1 mmHg at 87.0°C and 760 mmHg at 263.0ºC.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
Information from secondary source.
Reason / purpose for cross-reference:
reference to other study
Qualifier:
no guideline followed
Principles of method if other than guideline:
No data was provided within the handbook regarding type of test method.
GLP compliance:
no
Type of method:
other: no data provided
Temp.:
25 °C
Vapour pressure:
1.33 Pa
Remarks on result:
other: Reported as 0.01 mmHg @ 25ºC (extrapolated)
Conclusions:
The secondary reference reports the vapour pressure as 0.01 mmHg @ 25ºC (extrapolated),
Executive summary:

HSDB value is extrapolated from the data in Perry's Chemical Engineer's Handbook, 6th Ed.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1995
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
2.01 Pa
Remarks on result:
other: extrapolated

Calculation method: non-linear regression of the experimental points using a matrices of permutation of Fremann-Carrol.

The boiling temperature was verified according to the method of Siwoloboff, while the vapour pressure at 20°C was extrapolated by means of the equation of Antoine.

Parameters of Antoine: A = 9.1717 B = 3561.159 C = 303.932 [mmHg] (parameters deduced by the regression)

Conclusions:
The vapor pressure is 2.01 Pa at 20 °C

Description of key information

The vapour pressure at 20ºC is 2 Pa.

Key value for chemical safety assessment

Vapour pressure:
2 Pa
at the temperature of:
20 °C

Additional information

Various Klimisch 4 results were available. There was no serious disagreement between the results reported. The value selected for the key value for the chemical safety assessment (i.e. 2 Pa @ 20ºC) represents the worse case scenario at ambient temperature.