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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1999
Report date:
1999

Materials and methods

Principles of method if other than guideline:
Inhouse methode of Hoechst AG for vapour pressure
Range of measurement: 95 – 240°C
Representation and extrapolation of measuring values according ANTOINE
GLP compliance:
no
Type of method:
dynamic method

Test material

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
0.024 hPa
Remarks on result:
other: extrapolation according to Antionne

Any other information on results incl. tables

Temp. P (mess.) P (cal.) Delta
[°C] [hPa] [hPa] [%]
95,13 5,05 5,06 -0,15
108,68 10,03 10,00 0,29
123,87 20,02 20,03 -0,05
140,65 40,03 40,07 -0,10
159,29 80,03 80,08 -0,06
180,12 160 159,89 0,07
203,64 319,9 319,77 0,04
230,37 640,1 639,94 0,02
239,9 802,4 802,66 -0,03

Antione Equation: lnP [Pa] = A(1) - A(2) / (T+ A(3)) where T is given in [K]

A(1) = 21.314726

A(2) = 4320.2983

A(3) = -81.952133

Applicant's summary and conclusion

Conclusions:
According to the results of this test the extrapolated vapour pressure of the test item is ca. 0.02 hPa at
20° and ca. 0.3 hPa at 50°C.