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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 July 2017 to
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
-Purity: Unknown or Variable composition, is a Complex reaction product, or a Biological material (UVCB)
-Description: Dark Green Liquid
-Storage: Room temerature (15 to 30°C)
Key result
Temp.:
20 °C
Vapour pressure:
0.003 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0.004 Pa

The usual approach for vapour pressure testing is to use the smae samples throughout the test and keep them at different temperatures over long periods of time. Since the test substance is a mixture, this approach was not suitable.

Two tests with fresh test substances at four different temperatures, 20, 25, 31 and 35°C, were performed and the results combined.

Conclusions:
Under the conditions of the study, the vapor pressure of the test item has been determined to be 0.0027 Pa at 20°C and 0.0045 Pa at 25°C.
Executive summary:

The vapor pessure of the test item has been determined to be 0.0027 Pa at 20°C and 0.0045 Pa at 25°C to comply with

Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.

Description of key information

Key value for chemical safety assessment

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

Additional information

The vapor pessure of the test item has been determined to be 0.0027 Pa at 20°C and 0.0045 Pa at 25°C to comply with

Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.

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