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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
Study period:
between 07 January 2009 and 17 April 2009.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. QA statement)
Remarks:
Date of inspection: 19th August 2008 Date of signature: 4th March 2009
Type of method:
effusion method: vapour pressure balance
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: extrapolated

A total of 7 runs were undertaken, the table below shows the results for each run and the vapour pressure was worked out as an average based on all of these runs.

Run

Log10[Vp(25ºC)]

1

-8.62

2

-9.75

3

-8.01

4

-8.68

5

-9.13

6

-9.22

7

-10.0

Mean

-9.06

Vapour Pressure

8.75 x 10-10Pa
Conclusions:
The vapour pressure of the test material has been determined to be 8.8 x 10-10 Pa at 25 ºC using a vapour pressure balance.
A vapour pressure of 6.2E-06 Pa at 80 °C can be extrapolated based on the raw data of the study by the applicant.
Executive summary:

Vapour Pressure. 

The vapour pressure has been determined to be 8.8 x 10-10 Pa at 25 ºC, using a vapour pressure balance, Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.

Based on the raw data of the study a vapour pressure of 6.2E-06 Pa at 80 °C can be extrapolated.

Description of key information

The vapour pressure of the substance was determined as 8.8E-10 Pa at 25 °C (298 K) according to OECD Guideline 104 using the effusion method (vapour pressure balance). The vapour pressure at 298 K was extrapolated from the vapour pressure curve.

Key value for chemical safety assessment

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

Additional information

Testing was started after the sample had been under vacuum for approximately 44.5 hours. Temperature and pressure readings were taken between 160 and 170 °C with a one hour dwell at 160°C between runs. Based on the average result of seven runs, the vapour pressure of the substance was determined to be 8.8E-10 Pa at 25 °C (298 K).

A vapour pressure of 6.2E-06 Pa at 80 °C can be extrapolated based on the raw data of the study.