Fatty acids, C18 unsatd., mono- and diesters with triethanolamine, di-Me sulfate quaternized

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis for this analogue approach is that target and source substances, being different compounds, have similar physico-chemical properties based on structural similarity with common functional groups; a quaternized ethanolamine moiety, one to three ester groups with a typical UVCB distribution with long-chain fatty acids of natural origin.
Furthermore identical precursors (triethanolamine, long-chain fatty acids, dimethyl sulphate) are used for manufacturing. Therefore common breakdown products via physical and biological processes, which result in structurally similar chemicals, are evident.
For further information refer to general justification for read-across attached to chapter 13 of this IUCLID file.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See general justification for read-across attached to chapter 13 of this IUCLID file.

3. ANALOGUE APPROACH JUSTIFICATION
See general justification for read-across attached to chapter 13 of this IUCLID file.

4. DATA MATRIX
See general justification for read-across attached to chapter 13 of this IUCLID file.

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across: supporting information

Key result

Temp.:

20 °C

Vapour pressure:

0 Pa

Key result

Temp.:

25 °C

Vapour pressure:

0.001 Pa

Key result

Temp.:

50 °C

Vapour pressure:

0.004 Pa

Remarks on result:

other: The values at 20, 25, and 50°C were calculated using the Antoine equation.

The values at 20, 25, and 50°C were calculated using the Antoine equation.

Conclusions:

Vapour pressure of Fatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized is expected in the same order of mangnitude.

Executive summary:

The vapour pressure of the read-across substance partially unsaturated TEA-Esterquat was determined via vapour pressure balance (effusion method; OECD guideline 104 and EU-Method A.4) in the temperature range of 16 to 138°C. Two measurements were carried out (test item was degassed under vacuum; first run and without degassing; second run). No signal was observed up to a temperature of 39°C. Above 43°C, a vapour pressure could be measured. Based on the experimentally derived results and using the Antoine equation the vapour pressure at 20, 25, and 50°C were calculated. The test item shows a very low vapour pressure at ambient temperature (20°C: 4.4E-6 hPa, 4.4E-4 Pa; 25°C: 6.7E-6 hPa, 6.7E-4 Pa).

Vapour pressure of Fatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized is expected in the same order of mangnitude.

Description of key information

Vapour pressure of Fatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized is expected to be low approx. 4.4E-4 Pa at 20°C, based on read-across information.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure of the read-across substance partially unsaturated TEA-Esterquat was determined via vapour pressure balance (effusion method; OECD guideline 104 and EU-Method A.4) in the temperature range of 16 to 138°C. Two measurements were carried out (test item was degassed under vacuum; first run and without degassing; second run). No signal was observed up to a temperature of 39°C. Above 43°C, a vapour pressure could be measured. Based on the experimentally derived results and using the Antoine equation the vapour pressure at 20, 25, and 50°C were calculated. The test item shows a very low vapour pressure at ambient temperature (20°C: 4.4E-6 hPa, 4.4E-4 Pa; 25°C: 6.7E-6 hPa, 6.7E-4 Pa).

Vapour pressure ofFatty acids, C18 unsatd., mono and diester with triethanolamine , di-Me sulfate-quaternized is expected in the same order of mangnitude.