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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 15 July 2015 to 30 September 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
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Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
March 23, 2006
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Regulation EC no. 761/2009
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
August 1996
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
4-chloroformylphthalic anhydride
Key result
Temp.:
20 °C
Vapour pressure:
<= 0.017 Pa
Key result
Temp.:
25 °C
Vapour pressure:
<= 0.03 Pa
 Temperature (°C)  PT (Pa)
 100

36

37 

 110

69

76 

 120

140

150

 130

290

300 

The equation of the curve was: log PT = -4559 x 1/T + 13.77 (r = 0.9990, n = 8).

The PT values of the test item at 20°C and 25°C were extrapolated using the vapour pressure regression curve.

Considering the results were obtained with a temperature program of above the melting temperature, the extrapolated vapour pressure of the test item could be slightly overestimated. Therefore, a limit value (<=) is retained.

Conclusions:
The vapour pressures of the test item at 20°C and 25°C are respectively: <= 0.017 and <= 0.030 Pa.
The test item can be considered of low volatility at ambient temperature.
Executive summary:

The vapour pressure of the test item has been determined under GLP, according to recognized guidelines (EU A.4, OECD 104 and EPA OPPTS 830.7950), with the isothermal thermogravimetry (effusion) method. No deviation has been observed during the test.

Four measurements were recorded in duplicate between 100 and 130°C, i.e. above the melting point, so the results extrapolated from the linear regression below mp were considered as limit values.

The vapour pressures of the test item at 20°C and 25°C are respectively: <= 0.017 and <= 0.030 Pa.

The test item can be considered of low volatility at ambient temperature.

Description of key information

The test item can be considered of low volatility at ambient temperature.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test item was determined with the isothermal thermogravimetry (effusion) method, according to recognized guidelines (EU A.4, OECD 104 and EPA OPPTS 830.7950). No deviation has been observed during the test.