Heavy wax residue fraction, waste plastic derived, hydrothermal conversion

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 22 September 2021 to 10 November 2021

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

yes

Type of method:

effusion method: Knudsen cell

Key result

Temp.:

20 °C

Vapour pressure:

0.006 Pa

Remarks on result:

other:

Conclusions:

Vapour pressure at 20 and 25°C ≤ 6.27* 10-03Pa

Executive summary:

The vapour pressure of the test item Heavy wax residue fraction, waste plastic derived, hydrothermal conversion was determined at nine different temperatures (30 - 150 °C) according to OECD 104 resp. EU A.4 using the effusion method (weight loss). Experiment 1 – 9 (nominal temperature 30 - 150 °C) showed no reproducible weight loss. When visible contaminations, caused by explosive evaporation of the test item, were observed, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, these measurements were not used for calculations.

Vapour pressure was examined at nine different temperatures. No temperatures could be evaluated as they showed no reproducible or relevant weight loss.

As a calculation on base of the measured weight losses is not possible, the highest mean vapour pressure, derived from all measurements, is stated as limit value:

Vapour pressure at 135 °C: 6.27* 10-03Pa
Therefore, it also can be stated:
Vapour pressure at 20 and 25°C ≤ 6.27* 10-03Pa

The result of the test can be considered valid.

Key value for chemical safety assessment

Vapour pressure:

0.006 Pa

at the temperature of:

20 °C