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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:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
equivalent or similar to guideline
Guideline:
other: DIN EN 13016-2
GLP compliance:
no
Other quality assurance:
other: Quality assurance according to DIN EN ISO 9001 : 2008 and DIN EN ISO 14001 : 2009
Type of method:
static method
Key result
Temp.:
20 °C
Vapour pressure:
< 1 hPa
Remarks on result:
other: Extrapolated value from experimental results

Experimental results (5 measurements at different temperatures):

Temperature [°C] Vapour pressure [hPa] 
120 30 
125 34 
130 39
135 45 
140 51 

 

Regression equation to determine the vapour pressure:

y=-1913.7x + 6.3388 with R²=0.9999 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) = 0.647 hPa

Conclusions:
Extrapolated vapour pressure at 20 °C: < 1 hPa (0.647 hPa).
Executive summary:

Based on DIN EN 13016 -2, the vapour pressure at 20 °C has been linearly extrapolated on the basis of five experimentally determined values at 120, 125, 130, 135 and 140 °C. The resulting vapour pressure at 20 °C has been determined to be smaller than 1 hPa (0.647 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 five experimentally determined values at 120, 125, 130, 135 and 140 °C. The resulting vapour pressure at 20 °C has been determined to be smaller than 1 hPa (0.647 hPa).

Key value for chemical safety assessment

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

Additional information