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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:
17.05.2004-29.06.2004
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Principles of method if other than guideline:
In addition, the thermal stability and stability in air were investigated in the present study according to OECD Guideline 113.
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: vapour pressure balance
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0.001 Pa
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 vapour pressure of the test item 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)

-no degassing was performed (second run)

Results of the first run

Temperature (°C)

Vapour pressure (hPa)

59.5

5.4E-5

60.2

6.8E-5

65.2

1.2E-4

69.7

1.7E-4

70.0

1.9E-4

76.1

2.9E-4

76.7

2.6E-4

83.2

4.1E-4

93.3

5.6E-4

94.6

5.5E-4

104.8

7.9E-4

117.0

2.4E-3

118.7

2.7E-3

123.4

6.8E-3

125.1

5.8E-3

130.7

9.9E-3

133.8

6.3E-3

134.0

5.0E-3

137.4

4.0E-3

Results of the second run

Temperature (°C)

Vapour pressure (hPa)

43.2

1.8E-5

43.7

1.8E-5

49.1

3.7E-5

49.5

3.9E-5

55.0

8.5E-5

55.1

8.5E-5

60.2

1.1E-4

60.2

1.2E-4

65.0

1.6E-4

65.1

1.6E-4

69.8

2.0E-4

69.8

2.0E-4

74.8

2.5E-4

74.8

2.4E-4

80.1

3.1E-4

80.2

3.1E-4

85.6

3.5E-4

85.6

3.5E-4

100.8

5.7E-4

100.8

5.7E-4

119.3

1.3E-3

119.4

1.6E-3

119.5

1.3E-3

130.6

3.1E-3

130.7

3.4E-3

137.5

4.1E-3

137.5

4.1E-3

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 following results were obtained:

T in °C

p in hPa

p in Pa

20

4.4E-6

4.4E-4

25

6.7E-6

6.7E-4

50

4.4E-5

4.4E-3

The test item shows a very low vapour pressure at ambient temperature.

Conclusions:
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).
Executive summary:

The vapour pressure of 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).

Description of key information

4.4E-04 Pa at 20°C, 6.7E-04 Pa at 25°C; OECD TG 104/EU method A.4; GLP; RL1; read-across: partially unsaturated TEA-Esterquat

Key value for chemical safety assessment

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

Additional information

The vapour pressure of 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-06 hPa, 4.4E-04 Pa; 25°C: 6.7E-06 hPa, 6.7E-04 Pa).