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Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2017-09-01 to 2017-09-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
TOXI-COOP ZRT., 8230 Balatonfüred, Arácsi út 97., Hungary
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa

The vapour pressure was measured in the temperature range of 110 to 146 °C. For the evaluation the vapour pressure values in the range of 114 to 146 °C were used.

Stage No.

Temperature, °C

Δm/Δt, mg/min

Vapour pressure, Pa

1

114

8.4689 x 10-5

2.0017 x 10-2

2

118

1.2791 x 10-4

3.0387 x 10-2

3

122

2.1077 x 10-4

5.0330 x 10-2

4

126

3.6050 x 10-4

8.6518 x 10-2

5

130

5.8889 x 10-4

1.4204 x 10-1

6

134

9.1262 x 10-4

2.2121 x 10-1

7

138

1.3749 x 10-3

3.3488 x 10-1

8

142

1.8892 x 10-3

4.6240 x 10-1

9

146

2.9378 x 10-3

7.2250 x 10-1

Regression data of the vapour pressure curve - Regression output

Date of measurement

Intercept

Slope

R. Squared

04 September 2017

18.9832

-8007.5550

0.9980
Conclusions:
The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C:
Vapour pressure at 20 °C: 4.652 x 10-9 Pa
Vapour pressure at 25 °C: 1.336 x 10-8 Pa
Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures between 110 and 146 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 114 to 146 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C. The vapour pressure was calculated to be 4.652E-09 Pa at 20 °C and 1.336E-08 Pa at 25 °C, respectively.

Description of key information

The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C:

Vapour pressure at 20 °C: 4.652 x 10-9 Pa

Vapour pressure at 25 °C: 1.336 x 10-8 Pa

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item (reference 4.6-1). The vapour pressure of the test item was determined at temperatures between 110 and 146 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 114 to 146 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 and 25 °C. The vapour pressure was calculated to be 4.652E-09 Pa at 20 °C and 1.336E-08 Pa at 25 °C, respectively.