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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:
2 May 2018 - 04 May 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
23 March
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
24.August 2009
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
Toxi-Coop ZRT. Arácsi út 97. 8230 Balatonfüred Hungary
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa

The vapour pressure was measured in the temperature range of 80 to 120 °C. For the evaluation the vapour pressure values in the range of 95 to 120 °C were used. The measured vapour pressure values together with the measured temperatures and the regression data of the vapour pressure curve can be seen in Tables 1 and 2.

Table 1. Results of the Effusion method

Stage No.

Temperature, °C

Δm/Δt, mg/min

Vapour pressure, Pa

1

95.0

7.4293 x 10-6

1.7610 x 10-3

2

100.0

8.9804 x 10-6

2.1430 x 10-3

3

105.0

1.1154 x 10-5

2.6796 x 10-3

4

110.0

1.3083 x 10-5

3.1636 x 10-3

5

115.0

1.7780 x 10-5

4.3273 x 10-3

6

120.0

2.1660 x 10-5

5.3055 x 10-3

Table 2. Regression data of the vapour pressure curve - Regression output

Intercept

Slope

R. Squared

4.8233

-2794.7223

0.9919

 

 

Conclusions:
The vapour pressure of the test item sodium (2-butoxyethoxy) acetate was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C:
Vapour pressure at 20 °C: 1.949 x 10-5 Pa
Vapour pressure at 25 °C: 2.817 x 10-5 Pa
Executive summary:

A study according OECD TG 104 was conducted to determine the vapour pressure of the test item using Vapor Pressure Analyzer (Knudsen Effusion Method). The vapour pressure of sodium (2-butoxyethoxy) acetate at 20 °C was determined to be 1.949 E-5 Pa and the vapour pressure at 25 °C was determined to be 2.817 E-5 Pa.

Description of key information

The vapour pressure of the test item sodium (2-butoxyethoxy) acetate was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C:

Vapour pressure at 20 °C:       1.949 x 10-5 Pa

Vapour pressure at 25 °C:       2.817 x 10-5 Pa

Key value for chemical safety assessment

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

Additional information

A study according OECD TG 104 was conducted to determine the vapour pressure of the test item using Vapor Pressure Analyzer (Knudsen Effusion Method). The vapour pressure of sodium (2-butoxyethoxy) acetate at 20 °C was determined to be 1.949 E-5 Pa and the vapour pressure at 25 °C was determined to be 2.817 E-5 Pa.