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Physical & Chemical properties

Vapour pressure

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Administrative data

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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990
Report Date:
1990

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Cited as Directive 84/449/EEC, A.4
GLP compliance:
no
Type of method:
gas saturation method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): N,N-Dimethylharnstoff
- Analytical purity: 99.5 %

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
0 hPa

Any other information on results incl. tables

temperature  pressure
°C mbar
30.3 1.27E-3, 1.47E-3 (measured), 0.0013 (calculated*)
44.6 5.62E-3, 6.41E-3 (measured), 0.0058 (calculated)
55.0 1.45E-2, 1.51E-2 (measured), 0.016 (calculated)
59.2 2.39E-2 (measured), 0.023 (calculated)
60.0 2.30E-2 (measured), 0.025 (calculated)
76.4 9.32E-2 (measured), 0.100 (calculated)
76.5 1.01E-1 (measured), 0.101 (calculated)
90.2 3.03E-1, 3.15E-1 (measured), 0.293 (calculated)

*from regression analysis: ln(p/bar) = A + B / (C + t/Cels),
A = 19.1770, B = - 9923.60, C = 273.15;
Mean deviation between measured and calculated values: 5.68%
(30.3-90.2 °C)
The value at 20 °C is extrapolated.

Applicant's summary and conclusion