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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
10 Jan - 11 Jan 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
GLP guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
adopted in 2008
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
adopted in 2006
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
adopted in 1996
Qualifier:
according to guideline
Guideline:
other: OECD Test Guideline 113 (1981) Screening Test for Thermal Stability and Stability in Air
GLP compliance:
yes (incl. QA statement)
Remarks:
Hess. Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
dynamic method
Remarks:
Extrapolation of measured vapour pressures
Key result
Temp.:
20 °C
Vapour pressure:
0.85 hPa

Results
Thermal Stability
The test item showed a first exothermic effect in the temperature range of 150 to 200 °C with an energy of ca. -30 J/g.

Table 1 – Results of the DSC-measurements on thermal stability

Sample weight [mg]

Start of effect [°C]

Energy [J/g]

5.82

150 (exothermic)

-30

 

Dynamic method: Vapour-liquid equilibrium (VLE)
The vapour pressure was measured in the temperature range of 58.3 to 90.7 °C. The measured vapour pressure values together with the measured temperatures are listed in Table 2.

Table 2 – Results of the dynamic method

No.

Temperature [°C]

Vapour pressure [hPa]

Remark

1

58.3

10.1

Measured up

2

67.7

19.8

3

74.6

29.8

4

81.3

39.9

5

86.4

49.9

6

90.7

59.9

7

88.7

55.2

Measured down

8

83.9

44.9

9

78.0

35.0

 

From the measured data point of the vapour pressure curve, the constants A, B and C of the Antoine equation log10p = A + B/(C+θ) can be derived by regression (Microsoft Excel) of the data points to
A = 11.5440
B = - 2817.78
C = 273.15

The vapour pressure of the test item calculated by 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 and OECD test guideline 104 (2006) are shown in Table 3.

Table 3 – Calculated vapour pressure values for 20, 25 and 50 °C

Temperature [°C]

Vapour pressure [hPa]

20

0.85

25

1.24

50

6.67
Conclusions:
0.85 hPa at 20°C (Dynamic method - extraplolation from measured vapour pressure values, OECD 104).
Executive summary:

0.85 hPa at 20°C (Dynamic method - extraplolation from measured vapour pressure values, OECD 104).

Description of key information

The vapour pressure of the substance is 0.85 hPa at 20°C (Dynamic method - extraplolation from measured vapour pressure values, OECD 104).

Key value for chemical safety assessment

Vapour pressure:
0.85 hPa
at the temperature of:
20 °C

Additional information