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:
2014-10-07 to 2014-12-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
(2006)
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to
Guideline:
other: OECD Guideline 113 (1981): Screening Test for Thermal Stability and Stability in Air
Version / remarks:
1981
GLP compliance:
no
Type of method:
dynamic method
Test material information:
Composition 1
Temp.:
20 °C
Vapour pressure:
42.8 hPa
Key result
Temp.:
25 °C
Vapour pressure:
55 hPa
Temp.:
50 °C
Vapour pressure:
171.8 hPa

No thermal effects could be detected up to the maximum test temperature of 300 °C only at approx. 250 °C buildup of pressure was observed.

The vapour pressure was measured in the temperature range of 21.7 to 91.0 °C. From the measured data points of the vapour pressure curve can be derived by regression. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.

Temperature / °C

Vapour pressure / hPa

20

42.8

25

55.0

50

171.8

Results of the dynamic method

No.

Temperature /°C

Vapour pressure /hPa

Remark

1

21.7

44.9

Measured up

2

26.5

59.7

Measured up

3

29.5

69.5

Measured up

4

32.4

79.7

Measured up

5

37.2

98.7

Measured up

6

53.4

198.2

Measured up

7

71.3

398.1

Measured up

8

91.0

785.6

Measured up

9

82.6

597.8

Measured down

10

63.5

299.0

Measured down

11

46.3

147.7

Measured down

From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine

equation

log10 p = A + ( B / (C + T) )

can be derived by regression (Microsoft Excel) of the data points to

A = 10.1328

B = -1905.90

C = 273.15

Conclusions:
The vapour pressure of the test item was calculated to be 42.8 at 20°C, 55.0 at 25°C and 171.8 hPa at 50°C, by extrapolation of the measured vapour pressure curve (by Vapour-Liquid equilibrium(VLE).
Executive summary:

The vapour pressure of the test item was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC 440/2008 Method A.4.

Vapour Pressure:

Temperature\°C

Vapour pressure\hPa

20

42.8

25

55.0

50

171.8

 

Description of key information

Vapour pressure: 42.8 hPa at 20°C

Key value for chemical safety assessment

Vapour pressure:
55 hPa
at the temperature of:
25 °C

Additional information

The vapour pressure of the test item was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC 440/2008 Method A.4.Vapour Pressure:

Temperature / °C

Vapour pressure / hPa

20

42.8

25

55.0

50

171.8