Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: no information available wether the calculation model is validated for the substance under investigation
Principles of method if other than guideline:
The vapour pressure of the test substance was calculated using EPI Suite v4.00
GLP compliance:
no
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: vapour pressure (calculated): 7.5 x 10E-22 Pa at 25°C
Conclusions:
A vapour pressure of 7.5 x 10E-22 Pa at 25°C was calculated using EPI-Suite v4.00
Executive summary:

A vapour pressure of 7.5 x 10E-22 Pa at 25°C was calculated using EPI-Suite v4.00. Due to missing information about the applicability of the calculation model the result should be treated with care.

Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Study period:
28.07.2010 to 03.08.2010
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: guideline study, but based on the ionic structure the results are questionable
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0.011 Pa
Remarks on result:
other: mean of 10 runs
Transition / decomposition:
no
Conclusions:
A vapour pressure of 0.011 Pa at 25°C was determined using a vapour pressure balance method.
Executive summary:

In a study conducted compatible with EU Method A.4 (Vapour Pressure) and using the vapour pressure balance method, a vapour pressure of 0.011 Pa at 25°C was determined (mean of 10 measurements). Based on the ionic structure of the test substance, however, the results are questionable. The relative high vapour pressure might be caused by residual solvent present in the test sample.

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: no information available whether the calculation model is validated for the substance under investigation
Principles of method if other than guideline:
The vapor pressure of imidazolium compounds, 2-(C17 and C17-unsatd. alkyl)-1-[2-(C18 and C18-unsatd. amido)ethyl]-4,5-dihydro-1-methyl, Me sulfates was calculated using EPIWIN v3.20, MPBPWIN v1.42.
Type of method:
other: calculation
Remarks on result:
other: vapor pressure at 25°C: 1.06 x 10E-21 mm Hg (1.41 x 10E-21 hPa)

A vapor pressure of 1.06 x 10E-21 mm Hg (1.41 x 10E-21 hPa) at 25°C was calculated using EPIWIN v3.20, MPBPWIN v1.42. Due to missing information about the applicability of the calculation model in respect to the substance under investigation the result should be treated with care.

Conclusions:
The vapor pressure of imidazolium compounds, 2-(C17 and C17-unsatd. alkyl)-1-[2-(C18 and C18-unsatd. amido)ethyl]-4,5-dihydro-1-methyl, Me sulfates was calculated using EPIWIN v3.20, MPBPWIN v1.42. The calculation yielded a very low vapor pressure (1.06 x 10E-21 mm Hg; 1.41 x 10E-21 hPa at 25°C each). Due to missing information about the applicability of the calculation model in respect to the substance under investigation the result should be treated with care.

Description of key information

The substance has a high molecular weight of 733 g/mol and is ionic. Therefore vapour pressure is expected to be unmeasurably low. This is supported by the EPIWIN calculation resulting in a vapour pressure of 1.41 x 10E-21 hPa at 25°C.

Key value for chemical safety assessment

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

Additional information

Despite the vapour pressure of 1.41 x 10E-21 hPa at 25°C as calculated by EPIWIN, a vapour pressure of 1E-9 was chosen as this is the lowest possible value accepted by the respective IUCLID key-value field and to enable Exposure Assessment in Chesar 2.2.