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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:
May 17, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Remarks:
(Knudsen cell)
Key result
Temp.:
20 °C
Vapour pressure:
134 Pa
Key result
Temp.:
25 °C
Vapour pressure:
216 Pa

Vapour pressure of 2-methylcyclohexyl acetate at 20 °C and 25 °C 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 °C, obtained for five measurement points: 21.40, 23.00, 24.50, 26.00 and 28.70 °C.

The calculated values were:

Temperature (ºC)

Vapour pressure (Pa)

20

134

25

216

Conclusions:
The vapour pressure of 2-methylcyclohexyl acetate was determined to be 134 Pa at 20 ºC and 216 Pa at 25 ºC.
Executive summary:

The study of vapour pressure using effusion method was performed in accordance with the method EEC A4 (Knudsen cell). The vapour pressure of 2-methylcyclohexyl acetate was determined to be 134 Pa at 20 ºC and 216 Pa at 25 ºC.

Description of key information

Key study: Test method EEC A.4. GLP study. The vapour pressure of 2-methylcyclohexyl acetate was determined to be 134 Pa at 20 ºC and 216 Pa at 25 ºC.

Key value for chemical safety assessment

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

Additional information

Key study: The study of vapour pressure using effusion method was performed in accordance with the method EEC A.4. (Knudsen cell). The vapour pressure of 2-methylcyclohexyl acetate was determined to be 134 Pa at 20 ºC and 216 Pa at 25 ºC.

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