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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 2017-03-21 to 2017-04-11
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
GLP compliance:
yes (incl. QA statement)
Remarks:
TOXI-COOP Toxicological Research Center Zrt., H-8230 Balatonfüred, Arácsi út 97-99, Hungary (+ 5 further Hungarian addresses)
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 160 to 250 °C. For the evaluation the vapour pressure values in the range of 190 to 250 °C were used. At temperatures 160 - 180 °C no reproducible mass loss was determined, therefore, these values were not used for further evaluation.

Table 1: Results oft he Effusion method

Stage No.

Temperature, °C

Δm/Δt, mg/min

Vapour pressure, Pa

1

190

4.2699 x 10-5

1.6305 x 10-2

2

200

6.8680 x 10-5

2.6509 x 10-2

3

210

1.2439 x 10-4

4.8515 x 10-2

4

220

2.7411 x 10-4

1.0801 x 10-1

5

230

4.5611 x 10-4

1.8154 x 10-1

6

240

8.1534 x 10-4

3.2773 x 10-1

7

250

1.4439 x 10-3

5.8603 x 10-1

 

Regression data of the vapour pressure curve - Regression output

Date of measurement

Intercept

Slope

R. Squared

24 March 2017

12.0307

-6422.7255

0.9964
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:
at 20 °C 1.322E-10 Pa and at 25 °C 3.082E-10 Pa, respectively.
Executive summary:

A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures from 160 to 250 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 190 to 250 °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: at 20 °C 1.322 x 10-10 Pa and at 25 °C 3.082 x 10-10 Pa, respectively.

Description of key information

The vapour pressure of the test item was extrapolated of the measured vapour pressure curve to be 1.322E-10 Pa at 20 °C and 3.082E-10 Pa at 25 °C, respectively.

Key value for chemical safety assessment

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

Additional information

A study (reference 4.6-1) was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures from 160 to 250 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 190 to 250 °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: at 20 °C 1.322E-10 Pa and at 25 °C 3.082E-10 Pa, respectively.