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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 01 July 2015 to 26 July 2016.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
25 °C
Vapour pressure:
2.3 other: E-07 Pa
Temp.:
20 °C
Vapour pressure:
1 other: E-07 Pa

Table: Results of the isothermal TGA analysis (test substance)

Experiment

Temperature

[°C]

Weight loss

[µg/min]

νT

[g/cm2/h]

logνT

logPT

PT

[Pa]

 

 

 

 

 

 

 

1

200

4.620

5.51E-04

-3.26

0.84

6.9

 

210

7.839

9.36E-04

-3.03

1.11

13

 

220

13.12

1.57E-03

-2.81

1.37

23

 

230

21.19

2.53E-03

-2.60

1.61

41

 

 

 

 

 

 

 

2 (1)

200

3.734

4.46E-04

-3.35

0.73

5.3

 

210

8.444

1.01E-03

-3.00

1.14

14

 

220

15.72

1.88E-03

-2.73

1.46

29

 

230

25.41

3.03E-03

-2.52

1.70

51

 

 

 

 

 

 

 

3

200

4.835

5.77E-04

-3.24

0.86

7.2

 

210

7.817

9.33E-04

-3.03

1.10

13

 

220

12.64

1.51E-03

-2.82

1.35

22

 

230

20.92

2.50E-03

-2.60

1.61

40

 

 

 

 

 

 

 

(1) The vapour pressure regression curve constructed using the data of Experiment 1 and Experiment 2 had a coefficient of correlation of <0.99. Therefore, it was decided to perform a third experiment and to calculate the coefficient of correlation for the Experiment 1/Experiment 3 and Experiment 2/Experiment 3. Coefficient of correlation was >0.99 for the Experiment 1/Experiment 3. Based on this, the results from Experiment 2 were excluded.

Conclusions:
The vapour pressure of the substance PEMP product at 25°C was determined to be 2.3E-07 Pa.
Executive summary:

The vapour pressure was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950. The vapour pressure of PEMP product at 25°C was determined to be 2.3E-07 Pa. The vapour pressure at 20°C was determined to be 1.0E-07 Pa.

Description of key information

 Vapour pressure at 25°C: 2.3E-07 Pa (EC A.4, OECD 104, OPPTS 830.7950: isothermal thermogravimetric effusion)

Key value for chemical safety assessment

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

Additional information