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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Followed guideline and GLP requirements
Reference:
Composition 1
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Test material information:
Composition 1
Temp.:
ca. 25 °C
Vapour pressure:
ca. 0.059 Pa

Test material did not change in appearance under conditions of test.

Results of Vapor Pressure Determination (6 runs, temperatures 40 to 50 degrees C in 1 degree increments)

Run No.

Slope (SD) and intercept (SD) of line Log10Vp versus inverse of temperature in K

Log10 Vp of Vp at 298.15 K

1

-4560.428 (37.805)

14.088 (0.119)

-1.208

2

-4609.993 (38.537)

14.236 (0.121)

-1.226

3

-4615.228 (37.797)

14.248 (0.119)

-1.231

4

-4.644.712 (32.467

14.338 (0.102)

-1.240

5

-4657.153 (26.848)

14.375 (0.084)

-1.245

6

-4609.507 (31.710)

14.227 (0.100)

-1.233

Mean

Log10Vp

-1.230

Vp at 25 degrees C

5.9 x 10-2Pa

Conclusions:
The vapor pressure of the test material was determined to be 5.9 x 10 –2 Pa at 25 degrees C using a vapor balance method.
Executive summary:
    1. Vapor pressure of the test article was determined using a vapor pressure balance with measurements being made at several temperatures and linear regression analysis used to calculate the vapor pressure at 25 degrees C. Procedure used was designed to be compatible with Method A4 “Vapor Pressure” of Commission Regulation (EC) No. 440/2008 of 30 May 2008. The vapor pressure was determined to be 5.9 x 10–2Pa at 25 degrees C.

Description of key information

Vapor pressure of the test article was determined using a vapor pressure balance with measurements being made at several temperatures and linear regression analysis used to calculate the vapor pressure at 25 degrees C. Procedure used was designed to be compatible with Method A4 “Vapor Pressure” of Commission Regulation (EC) No. 440/2008 of 30 May 2008. The vapor pressure was determined to be 5.9 x 10–2Pa at 25 degrees C.

Key value for chemical safety assessment

Vapour pressure:
0.059 Pa
at the temperature of:
25 °C

Additional information