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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From April 4, 2016 to April 14, 2016
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:
equivalent or similar to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
not specified
Type of method:
dynamic method
Specific details on test material used for the study:
Batch no.: 145
Appearance: white granular powder
Key result
Temp.:
20 °C
Vapour pressure:
<= 0 Pa
Key result
Temp.:
50 °C
Vapour pressure:
0.023 Pa

The test substance had a vapour pressure of <= 3.9E-09 atm (<=4.0E-04 Pa; <=4.0 E-06 mbar) at 20°C and of 2.3E-07 atm (<=2.3E-02 Pa; <=2.3E-04 mbar) at 50°C according to the definition in the OECD Guideline 104. The experimentally determined vapour pressure of the test substance at 20°C was not in the recommended range of 1 to 1000 mbar for DSC-measurements. Therefore, an estimation procedure in accordance with the test method OECD Guideline 104 was used. This method is applied for vapour pressures between 103 and 10-7 mbar.

Conclusions:
Under the study conditions, the vapour pressure of the substance was determined to be 4.0E-04 Pa at 20°C and 2.3E-02 Pa at 50°C.
Executive summary:

A study was conducted to determine the vapour pressure of the substance according to OECD Guideline 104. The vapour pressure of the test substance was determined by dynamic method and Grain-Watson Method. The experimentally determined vapour pressure of the test substance at 20°C was not in the recommended range of 1 to 1000 mbar for DSC-measurements. Therefore an estimation procedure "Grain-Watson method" was used. This method is applied for vapour pressures between 103 to 10-7mbar. The vapour pressure of the test substance at 20°C and 50°C was determined using equations. Under the study conditions, vapour pressure of the substance was determined to be 4.0E-04 Pa at 20°C and 2.3E-02 Pa at 50°C (Kintrup, 2016).

Description of key information

The vapour pressure was determined according to OECD Guideline 104 (Kintrup, 2016)

Key value for chemical safety assessment

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

Additional information