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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. QA statement)
Type of method:
dynamic method
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0.17 hPa
Remarks on result:
other: extrapolated
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.27 hPa
Remarks on result:
other: extrapolated
Key result
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
1.9 hPa
Remarks on result:
other: interpolated
T [°C] p exp [hPa] p cal [hPa]
41.61 1.02 1.016
51.29 2.02 2.024
57.35 3.02 3.033
65.40 5.03 5.042
70.98 7.03 7.042
77.01 10.00 9.951
90.02 20.01 19.962
98.24 30.07 30.021
109.24 50.06 50.073
117.00 70.11 70.295

The regression of the results leads with a mean deviation of 0.26 % to the following equation:

ln(p/hPa) = 17.5630 - 4156.14 / (195.25 + T/°C)

Description of key information

Extrapolated 0.17 hPa at 20°C

Key value for chemical safety assessment

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

Additional information

The determination was conducted by dynamic method according to OECD Guideline 104.