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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:
2016-05-13 to 2016-07-01
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2008
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
GLP compliance:
no
Type of method:
dynamic method
Key result
Temp.:
20 °C
Vapour pressure:
2.35 hPa
Temp.:
25 °C
Vapour pressure:
3.18 hPa
Temp.:
50 °C
Vapour pressure:
12.53 hPa

From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation

log10 p= A+(B/(C+T) )

p = vapour pressure in Pa

T = temperature in °C

can be derived by regression (Microsoft Excel) of the data points to

A = 10.1936

B = -2292.94

C = 273.15

Conclusions:
The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).
Executive summary:

The vapour pressure of the test was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure.

The vapour pressure was measured in the temperature range of 51.1 to 116.6 °C.

The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C) using the dynamic method vapour-liquid equilibrium (VLE).

Description of key information

The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure. The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).