Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22 - 24 Jan 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
GLP compliance:
yes (incl. certificate)
Remarks:
Hessisches Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
dynamic method

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Vapour pressureopen allclose all
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Temp.:
50 °C
Vapour pressure:
0.009 Pa
Transition / decomposition
Transition / decomposition:
ambiguous
Transition temp.:
>= 120 - <= 160 °C

Any other information on results incl. tables

Thermal Stability results

An exothermic effect with an energy release of approximately -40 J/g was observed in the temperature range of 120 °C - 160 °C. Apart from that, the test item showed an endothermal effect with an energy consumption of minimum approximately 60 J/g starting at 255 °C. The test was terminated at 300 °C.

 

Dynamic method: Vapour-liquid equilibrium (VLE)

The vapour pressure was measured in the temperature range of 190.6 °C to 212.3 °C. The measured vapour pressure values together with the measured temperatures are listed in the following table:

No.

Temperature / °C

Vapour pressure / hPa

Remark

1

190.6

20

measured up

2

195.0

25

measured up

3

200.2

35

measured up

4

206.6

50

measured up

5

212.3

75

measured up

6

210.1

60

measured down

7

203 .1

40

measured down

8

196.7

30

measured down

 

From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation were derived by regression (Microsoft Excel):

 

A = 15.5810

B = -5695.92

C = 273.15

 

The vapour pressure of the test item calculated by extrapolation of the measured vapour pressure curve for the temperatures (20 °C, 25 °C, and 50 °C) are shown in the following table:

Temperature / °C

Vapour pressure / Pa

20

1.42E-04

25

3.00E-04

50

9.01E-03

 

Final Results

The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 °C, 25 °C and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006). The resulting vapour pressures are 1.42E-04, 3.00E-04 and 9.01E-03 Pa, respectively.

Applicant's summary and conclusion