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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, available as an unpublished report, reliable without restrictions
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
other: OECD 113 (1981) Screening test for thermal stability and stability in air
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: vapour pressure balance
Temp.:
50 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 2.4 x10-5 hPa
Temp.:
59 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.6 x10-5 hPa
Temp.:
67 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.2 x10-5 hPa
Temp.:
80 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 3.2 x10-5 hPa
Temp.:
90 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 6.6 x10-5 hPa
Temp.:
100 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.6 x10-4 hPa
Temp.:
20 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Reported as 7.8 x10-6 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Reported as 1.4 x10-5 Pa
Temp.:
50 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Reported as 2.1 x10-4 Pa

Thermal stability:

 Weight (mg)  Final temperature (°C)  Type of effect  Temperature Range (°C)  Enthalpy (J/g)  Crucible
 10.06  300 endothermal 130 - 160 n.r Closed glass crucible
 10.06  300  exothermal  160 - 190  -29  Closed glass crucible
 10.00  300  endothermal  125 - 160  n.r.  Closed glass crucible
 10.00  300  exothermal  160 - 185  -30  Closed glass crucible

n.r. = not relevent

Conclusions:
The following vapour pressure values were extrapolated from the experimental data (vapour pressure balance method), 7.8 x10-6 Pa at 20°C, 1.4 x10-5 Pa at 25°C and 2.1 x10-4 Pa at 50°C.
Executive summary:

The vapour pressure and thermal stability of carbonylhydrotris(triphenylphosphine)rhodium was assessed by the effusion method in a GLP-compliant study following standard test guidelines. The data points measured at 50 °C, 59 °C and 67 °C were not included in the linear regression because they show a deviation typically caused by volatile impurities at the beginning of a measurement. The measured vapour pressures were only slightly above the detection limit of the method. The following vapour pressure values were extrapolated from the experimental data (vapour pressure balance method), 7.8 x10-6 Pa at 20°C, 1.4 x10-5 Pa at 25°C and 2.1 x10-4 Pa at 50°C.

Description of key information

The following vapour pressure values were extrapolated from the experimental data (vapour pressure balance method), 7.8 x 10 -6 Pa at 20°C, 1.4 x 10 -5 Pa at 25°C and 2.1 x 10-4 Pa at 50°C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure and thermal stability of carbonylhydrotris(triphenylphosphine)rhodium was assessed by the effusion method in a GLP-compliant study following standard test guidelines (Nau 2015). The data points measured at 50°C, 59°C and 67°C were not included in the linear regression because they show a deviation typically caused by volatile impurities at the beginning of a measurement. The measured vapour pressures were only slightly above the detection limit of the method. The following vapour pressure values were extrapolated from the experimental data (vapour pressure balance method), 7.8 x 10-6 Pa at 20°C, 1.4 x 10-5 Pa at 25°C and 2.1 x 10-4 Pa at 50°C.