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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
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
GLP compliance:
yes
Type of method:
static method
Specific details on test material used for the study:
Clear colourless liquid, purity 96.5%.
Key result
Temp.:
20 °C
Vapour pressure:
274 Pa
Remarks on result:
other: +/- 10 Pa

At the beginning of the test the vapour pressure decreased slightly, probably due to the removal of volatile impurities. Because of this data after measurement 10 were used in the calc. measurement 30 and 31 were also excluded due to system instability at time of the measurements. Because the measured vapour pressures were >0.1 Pa no correction for thermal transpiration was made. The test substance was considered to show ideal behaviour. Thus the least squares method was used to draw a straight line to fit the data.

Conclusions:
Using the static technique, the vapour pressure of pentamethyl-trioxepane at 20 °C was determined to be 274 ± 10 Pa = 2.06 ± 0.08 mm Hg
Executive summary:

Using the static technique, the vapour pressure of pentamethyl-trioxepane at 20 °C was determined to be 274 ± 10 Pa = 2.06 ± 0.08 mm Hg

Description of key information

Using the static technique, the vapour pressure of pentamethyl-trioxepane at 20 °C was determined to be 274 ± 10 Pa = 2.06 ± 0.08 mm Hg

Key value for chemical safety assessment

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

Additional information