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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:
16 August 2012 to 20 November 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed in accordance with EU, OECD and US EPA test guidelines in compliance with GLP.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
other: isothermal thermogravimetric effusion method
Temp.:
20 °C
Vapour pressure:
0.002 Pa
Temp.:
25 °C
Vapour pressure:
0.003 Pa

Results of the isothermal TGA analysis

Temperature [°C]

Weight loss [μg/min]

vT

[g/cm2/h]

Log vT

Log PT

PT

[Pa]

130

11.19

1.34 x 10-3

-2.87

1.19

15

11.06

1.32 x 10-3

-2.88

1.18

15

140

18.57

2.22 x 10-3

-2.65

1.44

28

18.14

2.17 x 10-3

-2.66

1.43

27

150

29.96

3.58 x 10-3

-2.45

1.68

48

29.81

3.56 x 10-3

-2.45

1.68

47

160

46.68

5.57 x 10-3

-2.25

1.90

79

52.77

6.30 x 10-3

-2.20

1.96

91

 

Vapour pressure of the test substance

Temperature [°C]

Log PT

PT[Pa]

PT[mm Hg]

20

-2.83

1.5 x 10-3

1.1 x 10-5

25

-2.58

2.6 x 10-3

2.0 x 10-5

Conclusions:
The vapour pressure of the test substance was:
20°C (293K): 0.0015 Pa; 0.000011mm Hg
25°C (298K): 0.0026 Pa; 0.00002 mm Hg
Executive summary:

The aim of the study is to determine the following physico-chemical property for Benzenamine, N-phenyl-, reaction products with styrene and 2,4,4-trimethylpentene: Vapour pressure.

The study was performed in compliance with the Principles of Good Laboratory Practice (GLP) and the following testing guidelines:

European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", Official Journal of the European Union no. L220, August 24, 2009.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no.104: "Vapour Pressure", March 23, 2006.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapor pressure", August 1996.

 

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Benzenamine, N-phenyl-, reaction products with styrene and 2,4,4-trimethylpentene.

The vapour pressure of the test substance was:

20°C (293K): 0.0015 Pa; 0.000011mm Hg

25°C (298K): 0.0026 Pa; 0.00002 mm Hg

Description of key information

Key value determined using EU Method A4, OECD guideline 104 and US EPA OPPTS 830.7950.

Key value for chemical safety assessment

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

Additional information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Benzenamine, N-phenyl-, reaction products with styrene and 2,4,4-trimethylpentene.

The vapour pressure of the test substance was:

20°C (293K): 0.0015 Pa; 0.000011mm Hg

25°C (298K): 0.0026 Pa; 0.00002 mm Hg