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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:
2017-03-08 - 2017-05-03
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", Official Journal of the European Union no. L220, August 24, 2009.
United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapour pressure", August 1996.
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0.019 hPa
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.036 hPa

The method is validated in the range 10-8 - 103 Pa using a set of five reference substances with known vapour pressures. The validity of the method was verified maximum one month before this study using hexachlorobenzene as reference control substance. Since the logarithm of the evaporation rate at 20°C (log vT, 20) deviated < 10% from the average value obtained during the validation test, it was possible to apply the constants obtained with the validation test for the determination of the vapour pressure of the test item.

Conclusions:
The vapour pressure of the test item at 20°C and 25°C was 0.019 hPa and 0.036 hPa, respectively.
Executive summary:

The vapour pressure of the test item at 20°C and 25°C was 0.019 hPa and 0.036 hPa, respectively.

Description of key information

The vapour pressure of the test item at 20°C and 25°C was 0.019 hPa and 0.036 hPa, respectively.

Key value for chemical safety assessment

Vapour pressure:
0.019 hPa
at the temperature of:
20 °C

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