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Vapour pressure

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Reference
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 with acceptable restrictions (e.g. non-GLP)
Qualifier:
according to guideline
Guideline:
other: DIN-EN 13016-2
GLP compliance:
no
Other quality assurance:
other: DIN EN ISO 90001:2008, 14001:2005
Type of method:
static method
Remarks:
MiniVap (Fa. Grabner-Instruments)
Temp.:
20 °C
Vapour pressure:
2 hPa
Remarks on result:
other: extrapolated value based on experimental results

Experimental results (12 measurements at different temperatures):

Temperature [°C] Vapour pressure [hPa] 
95 57 
100 68 
105 81
110 97 
115

115 
 120  136
 125 162 
 130  191
 135  225
 140  264
 145 308 
 150 360 

 

Regression equation to determine the vapour pressure:

y=-2280.9x + 7.9408 with R²=0.9998 and y=log(p) with p=vapour pressure in hPa and x=1/T in K

Result from the above equation: Vapour pressure (20°C) = 2 hPa

Conclusions:
Extrapolated vapour pressure: 2 hPa at 20°C
Executive summary:

Based on DIN EN 13016 -2, the vapour pressure at 20 °C has been linearly extrapolated on the basis of twelve experimentally determined values at 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, and 150 °C. The resulting vapour pressure at 20 °C has been determined to be 2 hPa.

Description of key information

Based on DIN EN 13016 -2, the vapour pressure at 20 °C has been linearly extrapolated on the basis of twelve experimentally determined values at 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, and 150 °C. The resulting vapour pressure at 20 °C has been determined to be 2 hPa.

Key value for chemical safety assessment

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

Additional information