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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:
15 March 2012-19 June 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
(2009)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
(2006)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
(1996)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Remarks:
(Isothermal thermogravimetric effusion method)
Key result
Temp.:
20 °C
Vapour pressure:
< 1.5 other: E-3 Pa
Remarks on result:
other: <1.1 E-5 mm Hg
Temp.:
25 °C
Vapour pressure:
< 5.8 other: E-3 Pa
Remarks on result:
other: <4.3 E-5 mm Hg

The weight loss of the test substance at 110°C, 120°C, 130°C and 140°C was lower than the weight loss of hexachlorobenzene at the same temperatures. The vapour pressure of the test substance was determined to be lower than that of hexachlorobenzene. 

Conclusions:
The vapour pressure of the substance was determined to be < 1.5 E-3 Pa at 20°C (< 5.8 E-3 Pa at 25°C).
Executive summary:

Using the isothermal thermogravimetric effusion method, the vapour pressure of the substance was determined to be < 1.5 E-3 Pa at 20°C (< 5.8 E-3 Pa at 25°C). The study was performed in accordance with EC A.4, OECD 104 and OPPTS 830.7950 guidelines and according to the principles of GLP.

Description of key information

The vapour pressure of the substance was determined to be < 0.0015 Pa at 20°C.

The vapour pressure of MPKO, the hydrolysis product of OS2600 was 214 Pa at 20°C.

Key value for chemical safety assessment

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

Additional information

Key study: The vapour pressure of the test substance was determined according with OECD Guideline 104 and EU Method A.4. Using the isothermal thermogravimetric effusion method, the vapour pressure of the substance was determined to be < 1.5 E-3 Pa at 20°C (< 5.8 E-3 Pa at 25°C).

Supporting study: The static method was chosen for the determination of the vapour pressure of the analogue substance MPKO. The test was performed in accordance with OECD Guideline 104 and EU Method A.4. The vapour pressure was determined to be 214 Pa (1.60 mm Hg) at 20 ºC.