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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:
2009-2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
0.006 hPa
Remarks on result:
other: calculated
Temp.:
25 °C
Vapour pressure:
0.01 hPa
Remarks on result:
other: calculated
Temp.:
50 °C
Vapour pressure:
0.13 hPa
Remarks on result:
other: calculated

Results:

Temperature (°C) Vapour Pressure (hPa)
Measurement Calculation
65.90 0.46 0.483
75.56 1.00 0.979
85.82 2.00 1.946
92.38 2.99 2.930
101.24 4.99 4.922
107.47 6.99 6.941
114.36 9.97 9.961
138.19 29.97 30.450
150.63 49.98 50.880
169.16 99.65 101.545
190.03 199.67 202.180
203.44 299.74 301.565
221.84 499.79 498.550
235.03 699.71 693.242
250.49 1010.9 993.406

The regression of the results leads with a mean deviation of 1.60% to the following equation:

ln(p/hPa) = 15.90956 - 3626.61/(152.09 + t/°C)

Vapour pressures calculated from the regression equation:

Temperature (°C) Vapour Pressure (hPa)
20 5.7 x 10-3
25 1.0 x 10-2
50 0.13
252.1 1013.25
Conclusions:
The vapour pressure of the test substance was determined to be 0.0057 hPa at 20°C.
Executive summary:

In this guideline (OECD 104) study conducted to GLP standards, the test material (EC 231-272-0) was determined to have a vapour pressure of 0.0057 hPa at 20°C

Description of key information

 Study conducted to recognised training guidelines with GLP

Key value for chemical safety assessment

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

Additional information

The vapour pressure was determined by dynamic method to be 0.0057 hPa at 20°C