Registration Dossier

Diss Factsheets

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
23 September - 16 November 2016
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
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
- Analytical purity: 94.55 %
- Expiration date: 31 December 2017
- Storage condition: at room temperature
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Remarks on result:
other: The vapour pressure of the test item is given as the mean value of two measurements.
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: The vapour pressure of the test item is given as the mean value of two measurements.

The test was started at 53°C, the initial high weight losses were probably attributable to residual water as the weight losses became too low to be measured on the third test. A similar pattern emerged at the 110°C with the weight losses decreasing. These weight losses were probably attributable to impurities from the manufacturing process. The vapour pressure was therefore determined from the final measurement at 110°C to 144°C, the actual value at 144°C was excluded because the vapour pressure was lower than that at 143°C, a subsequent measurement at 127°C confirmed that it was appropriate to exclude the measurement at 144°C.

The contents of the crucibles were examined and analysed by IR. The native material was a brown free flowing liquid, the contents of the control was the same, but the tested material was a dark brown tar like liquid. There were also differences in the IR suggesting that the residual impurities were masking some of the functional groups and that the test had either purified or degraded the material.

Conclusions:
The vapour pressure of the test substance was determined to be 1.2E-8 Pa at 20.0°C and 2.2E-8 Pa at 25.0°C.

Description of key information

Based on a GLP study (K1, Foster, 2016) according to the EU method A.4 and OECD guideline 104, the vapour pressure of the test substance at 20°C and 25°C equals 1.2 E-08 Pa and 2.2 E-08 respectively.

Key value for chemical safety assessment

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

Additional information

Categories Display