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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:
2015-11-03 to 2015-11-05
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
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)
Type of method:
effusion method: vapour pressure balance
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa
Temp.:
50 °C
Vapour pressure:
0 Pa

Thermal Stability:

In the temperature range of 55-80°C an endothermic effect can be observed, which can be assigned to the melting point of the test item. An exothermic effect was observed starting at a temperature of 240°C up to the maximum test temperature of 300°C, with decomposition energy of greater than -280 J/g.

Table 1: Result of the DSC-measurement

No.

Sample weight / mg

Start / °C

Energy / J/g

PN9946

9.35

55 (endothermic)

240 (exothermic)

+ 70

>-280

 

Table 2: Results of the Effusion method

No.

Temperature / °C

Vapour pressure / Pa

1

40

1.97 x 10^-4

2

44

2.65 x 10^-4

3

46

3.09 x 10^-4

4

50

4.05 x 10^-4

5

53

5.51 x 10^-4

6

56

7.43 x 10^-4

7

59

1.11 x 10^-3

8

62

1.69 x 10^-3

9

65

2.17 x 10^-3

10

68

3.30 x 10^-3

 

Conclusions:
The vapour pressure was determined to be: 1.5 x 10^-5 Pa at 20°C, 2.8 x 10^-5 Pa at 25°C and 4.7 x 10^-4 Pa at 50°C ( by effusion method: vapour pressure balance) according to OECD Test Guideline 104 (2006) and Regulation EC 440/2008 Method A.4.Vapour Pressure.

Description of key information

According to OECD 104 (2006) a vapour pressure of1.5 x 10-5Pa at 20°C, 2.8 x 10-5Pa at 25°C and 4.7 x 10-4Pa at 50°C was determined (by effusion method: vapour pressure balance).

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information