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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:
05.07.09.2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
0 Pa

The vapour pressure was measured in the temperature range of 80 °C to 105 °C. After the measurement a mass loss of approx. 8 % (w/w) was determined. A molecular mass of 376.53 g/mol was used for the evaluation.

Measured vapour pressures and corresponding temperatures

Temperature / °C

Vapour pressure / hPa

80

2.4 x -10-5

85

6.1 x 10-5

90

1.1 x 10-4

95

1.9 x 10-4

100

3.3 x 10-4

105

5.6 x 10-4

95

2.0 x 10-4

 

The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C

Conclusions:
The vapour pressure of the test item at 25 °C was determined to be 4.9E-7Pa.
Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined in the temperature range 80 -105°C. After the measurement a mass loss of approx. 8 % (w/w) was determined. A molecular mass of 376.53 g/mol was used for the evaluation. The values for 20, 25 and 50°C are calculated, using the Antoine constants A, B and C. The vapour pressure of the test item was determined to be 1.9E-7 Pa at 20°C, 4.9E-7 Pa at 25°C and 3.5E-5 Pa at 50°C respectively.

Description of key information

The vapour pressure of the test item at 25 °C was determined to be 4.9E-7Pa (reference 4.6 -1).

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined in the temperature range 80 -105°C. After the measurement a mass loss of approx. 8 % (w/w) was determined. A molecular mass of 376.53 g/mol was used for the evaluation. The values for 20, 25 and 50°C are calculated, using the Antoine constants A, B and C. The vapour pressure of the test item was determined to be 1.9E-7 Pa at 20°C, 4.9E-7 Pa at 25°C and 3.5E-5 Pa at 50°C respectively.