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Physical & Chemical properties

Vapour pressure

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Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2002-02-04 to 2002-03-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
92/69 EEC No. L383, 1992
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: vapour pressure balance
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Lot/batch No.of test material: KS-010205
- Expiration date of the lot/batch: March 2003
Key result
Temp.:
20 °C
Vapour pressure:
0 hPa
Key result
Temp.:
25 °C
Vapour pressure:
0 hPa

Data from vapour pressure measurements

Temperature / °C

Pressure / hPa

15

0.000035

20

0.000039

25

0.000044

30

0.000055

35

0.000059

40

0.000083

45

0.00012

50

0.00020
Conclusions:
The vapour pressure of the test item at 20 °C was determined to be 0.000038 hPa and 0.000045 hPa at 25 °C.
Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 92/69 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 eight different temperatures (from 15 to 50 °C with 5 °C increments) using the effusion method (vapour pressure balance). All measured values showed good reproducibility, a mean value of three measurements per temperature was calculated. Therefore, the result of the test according to the guideline criteria was considered to be valid. The vapour pressure was graphically interpolated using the linear regression plot of the Log P versus 1/T function. The vapour pressure was interpolated to be 0.000038 hPa at 20 °C and 0.000045 hPa at 25 °C, respectively.

Description of key information

The vapour pressure of the test item at 20 °C was determined to be 0.000038 hPa and 0.000045 hPa at 25 °C.

Key value for chemical safety assessment

Vapour pressure:
0 hPa
at the temperature of:
25 °C

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 92/69 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 eight different temperatures (from 15 to 50 °C with 5 °C increments) using the effusion method (vapour pressure balance). All measured values showed good reproducibility, a mean value of three measurements per temperature was calculated. Therefore, the result of the test according to the guideline criteria was considered to be valid. The vapour pressure was graphically interpolated using the linear regression plot of the Log P versus 1/T function. The vapour pressure was interpolated to be 0.000038 hPa at 20 °C and 0.000045 hPa at 25 °C, respectively.