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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 July 11, 2016 to July 28, 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
equivalent or similar to
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:
- Name of test material (as cited in study report): Phosphoric acid, mono-and di-C8-C10-(even numbered)-alkyl esters
Batch: 205624/01
Appearance: liquid
Key result
Temp.:
20 °C
Vapour pressure:
<= 720 Pa
Key result
Temp.:
50 °C
Vapour pressure:
<= 3 900 Pa

The test substance had a vapour pressure of <= 7.1E-03 atm (<=7.2E+02 Pa; <=7.2E+00 mbar) at 20°c and of <= 3.8E-02 atm (<=3.9E+03 Pa; <=3.9E+01) at 50°C according to the definition in the OECD Guideline 104 (Grain-Watson estimation). The calculation was based on the lowest possible boiling temperature.

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 10E03 and 10E-07 mbar.

Conclusions:
Under the study conditions, the vapour pressure of the substance was determined to be ≤720 Pa at 20°C.
Executive summary:

A study was conducted to determine the vapour pressure of the test substance according to OECD Guideline 104 similar to EU method A.4 (differential scanning calorimetry (DSC)). The practical test performance was based on the in-house test procedure VTA(S) 31X07001.01: 'determination of the vapour pressure curve of solid and liquid substances by means of DSC'. The test substance had a vapour pressure of <= 7.1E-03 atm (<=7.2E+02 Pa; <=7.2E+00 mbar) at 20°c and of <= 3.8E-02 atm (<=3.9E+03 Pa; <=3.9E+01) at 50°C according to the definition in the OECD Guideline 104 (Grain-Watson estimation). The calculation was based on the lowest possible boiling temperature. 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 10E03 and 10E-07 mbar. Under the study conditions, the vapour pressure of the substance was determined to be ≤720 Pa at 20°C (Kintrup, 2016).

Description of key information

The vapour pressure was determined according to OECD Guideline 104 and EU Method A.4 (Kintrup, 2016).

Key value for chemical safety assessment

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

Additional information