Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
29 June, 2009 - 6 August, 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed according to OECD and/or EC guidelines, and according to GLP principles.
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Temp.:
20 °C
Vapour pressure:
2.98 Pa

The results of the isothermal TGA analysis are given in the table 7:

Table 7: Results of the isothermal TGA analysis

Temperature (°C)

Weight loss (µg/min)

VT (g/cm2/h)

Log

40

10.74

1.28 x 10-3

-2.89

 

8.889

1.06 x 10-3

-2.97

50

28.45

3.40 x 10-3

-2.47

 

26.01

3.10 x 10-3

-2.51

60

64.59

7.71 x 10-3

-2.11

 

60.44

7.21 x 10-3

-2.14

70

132.3

1.58 x 10-3

-1.80

 

124.0

1.48 x 10-3

-1.83

The log VT of the test substance was represented as function of the reciproval temperatures. The coefficient of correlation (r) was > 0.99. Extrapolation of the curve to 10°C resulted in a value of -3.78 for the logVT,20 of the test substance. Fitting this value in the regression curve, a vapor pressure of 2.98 Pa = 2.24 x 10 -2 mmHg was obtained.

Conclusions:
The isothermal thermogravimetric effusion method was chosen for the determination of the vapour pressure of 2-sec-butylphenol. The vapour pressure of the test substance at 20°C (293K) was 2.98 Pa = 2.24 x 10-2 mm Hg.
Executive summary:

The vapour pressure of 2 -sec-butylphenol was determined by the isothermal thermogravimetric effusion method. The method followed OECD Guideline 104 (Vapour Pressure Curve) and EU Method A. 4 (Vapour Pressure). The log VT of the test substance was represented as function of the reciproval temperatures. The coefficient of correlation (r) was > 0.99. Extrapolation of the curve to 10°C resulted in a value of -3.78 for the logVT,20 of the test substance.

The vapour pressure of the test substance at 20°C (293K) was 2.98 Pa = 2.24 x 10-2 mm Hg.

Description of key information

Vapor pressure at 20°C (293K): 2.98 Pa = 2.24 x 10E-2mm Hg.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of 2 -sec-butylphenol was determined by the isothermal thermogravimetric effusion method. The method followed OECD Guideline 104 (Vapour Pressure Curve) and EU Method A. 4 (Vapour Pressure). The log VT of the test substance was represented as function of the reciproval temperatures. The coefficient of correlation (r) was> 0.99. Extrapolation of the curve to 10°C resulted in a value of -3.78 for the logVT,20 of the test substance.

The vapour pressure of the test substance at 20°C (293K) was 2.98 Pa = 2.24 x 10-2mm Hg.