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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1949
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The purety and method are given in this publication.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
other: WilIinghanl, C. B., Taylor, W. J., Pignocco, J. M., and Rossini, F. D., J. R.search Natl. Bur. Standards. 35, 219 (1945)
Deviations:
yes
Remarks:
see Principles of method if other than guideline
Principles of method if other than guideline:
The points for controlling the pressure were placed on the atmospheric side instead of on the pressure side.

Temp.:
20 °C
Vapour pressure:
26 Pa

See graph in the attachment.

Calculated results:
At 20°C 0,026159 kPa

 0,026159 kPa = 26 Pa.

Conclusions:
The vapour pressure of pure 2-phenylpropan-2-ol is 26 Pa at 20°C.
Executive summary:

The purety and method are given in this publication. With the data in this paper a calculation is made by Nuysink to determine by extrapolation the vapour pressure.

The vapour pressure of pure 2-phenylpropan-2-ol is 26 Pa at 20°C.

The vapour pressure of the commercial product will be different, because the impurities will effect the outcome.

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Remarks:
in line with literature/calculated vapor pressure values
Qualifier:
no guideline followed
Principles of method if other than guideline:
Software V11.02

GLP compliance:
no
Temp.:
25 °C
Vapour pressure:
0.183 Torr
Temp.:
25 °C
Vapour pressure:
24.4 Pa

0.183 Torr = 24.4 Pa.

Conclusions:
The calculated vapour pressure of 2-phenylpropan-2-ol is 24.4 Pa at 25°C.
Executive summary:

The calculated vapour pressure of 2-phenylpropan-2-ol is 0.183 Torr that is 24.4 Pa at 25°C.

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
Adequacy of study:
weight of evidence
Study period:
Januari 2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well conducted calculation with literature data.
Qualifier:
no guideline required
Principles of method if other than guideline:
calculated using literature data
GLP compliance:
no
Type of method:
other: calculation
Temp.:
20 °C
Vapour pressure:
0.154 mm Hg
Temp.:
20 °C
Vapour pressure:
21 Pa

See the figure in the attachment.

The vapour pressure is 0.154 mmHg = 0.02053 KPa = 21 Pa.

Conclusions:
The vapour pressure of pure 2-phenylpropan-2-ol is 21 Pa at 20°C.
Executive summary:

Well conducted calculation with literature data by one of the experts of AkzoNobel. The outcome is pausible.

The vapour pressure of pure 2-phenylpropan-2-ol is 26 Pa at 20°C. The vapour pressure of the commercial product will be different, becase the impurities will effect the outcome.

Description of key information

The vapour pressure of pure 2-phenylpropan-2-ol  is 23 Pa at 20°C.

Key value for chemical safety assessment

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

Additional information

Weight of evidence on three endpoints:

Endpoint study record Vapour pressure
  Pa
617-94-7, Vapour pressure, Dreisbach, 1949, WoE

26,16

617-94-7, Vapour pressure, Nuysink, 2013, WoE

20,53

617-94-7, Vapour pressure, ACD, 2012, WoE

24.40

Average 

23,3