Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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:
2019-04-04 to 2019-04-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2008
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance
Temp.:
20 °C
Vapour pressure:
0.016 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0.023 Pa
Vapour pressure:
0.14 Pa

The vapour pressure was measured in the temperature range of 32 -68 °C. The measured vapour pressure values together with the measured temperatures are listed in Table 1.

Table 1: Results of teh Effusion method

No.

Temperature / °C

Vapour pressure / Pa

1

32

4.09 × 10-2

2

37

5.54 × 10-2

3

42

8.08 × 10-2

4

47

1.21 × 10-1

5

53

1.75 × 10-1

6

58

2.45 × 10-1

7

63

3.31 × 10-1

8

68

4.45 × 10-1

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


Log 10 p = A + B / T = A + B / C+ϑ


can be derived by regression of the data points to
A = 8.5806
B = -3045.56
C = 273.15.


The vapour pressure of the test item Ammonium 2-ethylhexyl sulfate calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006) is shown in Table 2:

Table 2: Calculated vapour pressure values for 20, 25 and 50 °C

Temperature / °C

Vapour pressure / Pa

20

1.6 x 10-2

25

2.3 x 10-2

50

1.4 x 10-1


Conclusions:
For the test item a vapour pressure of 0.016, 0.023 and 0.14 Pa at 20, 25 and 50 C° was determined, respectively.
Executive summary:

The vapour pressure of the test item was determined in a study according to OECD guideline 104 and EU Method A.4. 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. In this study a vapour pressure of 0.016, 0.023 and 0.14 Pa at 20, 25 and 50 C° was determined, respectively.

Description of key information

For the test item a vapour pressure of 0.016, 0.023 and 0.14 Pa at 20, 25 and 50 C° was determined, respectively.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test item was determined in a study according to OECD guideline 104 and EU Method A.4.The vapour pressure of the test itemwas calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.In this study avapour pressure of 0.016, 0.023 and 0.14 Pa at 20, 25 and 50 C° was determined, respectively.