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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Data published in peer-reviewed literature
Principles of method if other than guideline:
Value taken from an acceptable handbook. No details on method and guideline available.
GLP compliance:
not specified
Type of method:
other: Handbook data
Temp.:
100 °C
Vapour pressure:
4.4 kPa
Temp.:
180 °C
Vapour pressure:
67 kPa
Transition / decomposition:
no
Conclusions:
The vapour pressure of DVB-55 is 4.4 kPa at 100°C and 67 kPa at 180°C.
Executive summary:

The vapour pressure of DVB-55 is 4.4 kPa at 100°C and 67 kPa at 180°C.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
Dynamic Method
GLP compliance:
no
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
0.382 mm Hg
Remarks on result:
other: Vapor pressure at 20°C determined from extrapolation of the Antoine Equation below 79.19°C
Temp.:
25 °C
Vapour pressure:
0.551 mm Hg
Remarks on result:
other: Vapor pressure at 25°C determined from extrapolation of the Antoine Equation below 79.19°C
Temp.:
79.19 °C
Vapour pressure:
12.95 mm Hg

Table 1. Summary of measured vapour pressures of DVB-HP at various temperatures

 Temperature (°C)  Vapour Pressure (mm Hg)
 79.190  12.950
 90.325  22.251
 99.349  32.236
 106.012  42.098
 115.834  61.300
 123.398  81.211
 129.600  101.060
 150.322  200.428

Data of measured vapor pressure and temperature were regressed using the Antoine Equation, of the form:

Log P (mm Hg) = A - B/(T + C)

The derived Antoine constants, where P is in mm Hg and T in °C, were as follows:

A = 7.15806

B = 1765.27

C = 213.036

Vapor pressures at 20 and 25°C determined from extrapolation of the above data below the lowest temperature at which vapor presssure was determined (79.19°C).

Conclusions:
The vapor pressure of DVB-HP at 20°C is 0.382 mm Hg (0.509 hPa at 293 K)
The vapor pressure of DVB-HP at 25°C is 0.551 mm Hg (0.735 hPa at 298 K)
Executive summary:

The vapor pressure of DVB-HP at 20°C is 0.382 mm Hg (0.509 hPa at 293 K)

The vapor pressure of DVB-HP at 25°C is 0.551 mm Hg (0.735 hPa at 298 K)

Description of key information

Vapour pressure of 50.9 Pa at 20°C is from a DVB high purity sample. Different grades of DVB will give slightly different vapour pressure values.

Key value for chemical safety assessment

Vapour pressure:
50.9 Pa
at the temperature of:
293 K

Additional information

Data of measured vapour pressure and temperature were regressed using the Antoine Equation, of the form:

Log P (mm Hg) = A - B/(T + C)

The derived Antoine constants, where P is in mm Hg and T in °C, were as follows:

A = 7.15806

B = 1765.27

C = 213.036

Vapour pressures at 20 and 25°C determined from extrapolation of the above data below the lowest temperature at which vapour pressure was determined (79.19°C).

 Temperature (°C)  Vapour Pressure (mm Hg)
 79.190  12.950
 90.325  22.251
 99.349  32.236
 106.012  42.098
 115.834  61.300
 123.398  81.211
 129.600  101.060
 150.322  200.428