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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:
30 August 2016 - 29 September 2016
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:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
no
Remarks:
No formal claim. Study conducted in a facility operating to GLP.
Type of method:
gas saturation method
Key result
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Temp.:
20 °C
Vapour pressure:
< 0 Pa

The results of the experiments are tabulated below:

Test Temperature

(°C)

Volume N2(m3n)

*Amount collected (μg) in 1st trap

*Amount collected (μg) in 2nd trap

Total amount collected (μg)

Vapour pressure (Pa)

25.1

0.541

0.00

0.00

0.00

< 5.03 x 10-6

25.1

0.710

0.00

0.00

0.00

< 3.83 x 10-6

25.1

0.795

0.00

0.00

0.00

< 3.43 x 10-6

The vapour pressure of the test substance at 25 °C is lower than the 1 x 10 -5 Pa limit; therefore the vapour pressure curve was not determined. No test substance was detected in the condensation tubes indicating the vapour pressure must be very low.

The upper limit for the vapour pressure was determined by using the lowest calibration concentration (0.198 μg of test item). Substituting this value into the vapour pressure calculation gave an upper limit for the vapour pressure. Since no test item peak was found then the vapour pressure of the test substance must be < 5.0 x 10-6 at 25 °C.

Conclusions:
The vapour pressure of the test substance has been determined to be < 5.0 x 10e-6 Pa at 20 °C and < 5.0 x 10e-6 Pa at 25 °C.
Executive summary:

The study was performed to determine the density of the test substance using OECD method 104 and US EPA OPPTS 830.7950

The vapour pressure of the test substance has been determined using the gas saturation method to be < 5.0 x 10-6 Pa at 20 °C and < 5.0 x 10-6 Pa at 25 °C.

Description of key information

The vapour pressure of the test substance has been determined using the gas saturation method to be < 5.0 x 10-6Pa at 20 °C and < 5.0 x 10-6Pa at 25 °C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information