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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:
May 29, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
24.92 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
44.99 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: 25.2ºC, 27.6ºC, 30.2ºC and 32.9ºC.

Table 1. Summary of vapour pressure determination results.

Vapour pressure at 20ºC

Vapour pressure at 25ºC

24.92 Pa

44.99 Pa

 

Conclusions:
The vapour pressure of D-alpha fenchol was determined to be 24.92 Pa at 20ºC and 44.99 Pa at 25 ºC.
Executive summary:

The vapour pressure of the test item was determined according to OECD 104/ EU Method A.4, under GLP conditions.The vapour pressure of D-alpha fenchol using the effusion method with Knudsen cell was determined to be 24.92 Pa at 20ºC and 44.99 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 24.92 Pa at 20ºC and 44.99 Pa at 25 ºC.

Key value for chemical safety assessment

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

Additional information

Key study: The study of vapour pressure using effusion method was performed in accordance with EU Method A.4 (based on the method OECD 104). The vapour pressure of D-alpha fenchol was determined to be 24.92 Pa at 20ºC and 44.99 at 25 ºC.