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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10 July 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa

Vapour pressure of the test item at 20ºC and 25ºC was calculated on the basis of equation log (p) = f (1/ t) = a-b/(t+273.15) where: p – vapour pressure in Pa, t – temperature in ºC, obtained for four measurement points: 244.5, 249.4, 254.1 and 259.1ºC.

Table 1. Summary of vapour pressure determination results.

Vapour pressure at 20ºC

Vapour pressure at 25ºC

8.80e-15 Pa

2.73e-14 Pa

 

Conclusions:
The vapour pressure of the test substance was determined to be 8.8e-15 Pa at 20ºC and 2.73e-14 Pa at 25 ºC.
Executive summary:

The vapour pressure of the test substance was investigated by the effusion method with Knudsen cell according to OECD 104/ EU Method A.4, under GLP conditions. The vapour pressure of the test substance was determined to be 8.8e-15 Pa at 20ºC and 2.73e-14 Pa at 25 ºC.


Description of key information

Key study. Test method according to OECD 104/ EU Method A.4, GLP study. The vapour pressure of the test item is 8.8e-15 Pa at 20ºC and 2.73e-14 Pa at 25 ºC.


Key value for chemical safety assessment

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

Additional information