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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:
guideline study
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.:
30 °C
Vapour pressure:
0.002 hPa
Temp.:
34 °C
Vapour pressure:
0.004 hPa
Temp.:
40 °C
Vapour pressure:
0.006 hPa
Temp.:
45 °C
Vapour pressure:
0.01 hPa
Temp.:
50 °C
Vapour pressure:
0.014 hPa
Temp.:
20 °C
Vapour pressure:
0.075 Pa
Temp.:
25 °C
Vapour pressure:
0.13 Pa
Temp.:
50 °C
Vapour pressure:
1.5 Pa

The results at 20, 25 and 50 °C are conservative estimations.

Thermal stability:

 Weight (mg)  Final temperature (°C)  Type of effect  Temperature Range (°C)  Enthalpy (J/g)  Crucible
 10.41  300 endothermal 155 - 215 n.r  Closed glass crucible in high pressure crucible
 10.52  300  endothermal  145 - 200  n.r.  Closed glass crucible

n.r. = not relevent

Conclusions:
The vapour pressure of the test item was determined to be 7.5 x 10-2 Pa at 20°C, 1.3 x 10-1 Pa at 25°C and 1.5 Pa at 50°C.
Executive summary:

The vapour pressure and thermal stability of dicarbonyl(pentane-2,4 -dionato-O,O')rhodium was assessed by vapour pressure balance (effusion method) following the OECD 104 (2006), OECD 113 (1981) and EU method A.4 test guidelines. The study is GLP compliant and follows standard guidelines and therefore is suitable for use as the key study for this endpoint.

Vapour pressure at 20°C, 25° and 50°C were extrapolated from the experimental data. The vapour pressure of the test item was determined to be 7.5 x 10-2Pa at 20°C, 1.3 x 10-1Pa at 25°C and 1.5 Pa at 50°C.

Description of key information

The vapour pressure of the test item was determined to be 7.5 x 10-2Pa at 20°C, 1.3 x 10-1Pa at 25°C and 1.5 Pa at 50°C.

Key value for chemical safety assessment

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

Additional information

The vapour pressure and thermal stability of dicarbonyl(pentane-2,4 -dionato-O,O')rhodium was assessed by vapour pressure balance (effusion method) following the OECD 104 (2006), OECD 113 (1981) and EU method A.4 test guidelines (Nau 2015). The study is GLP compliant and follows standard guidelines and therefore is suitable for use as the key study for this endpoint. Vapour pressures at 20°C, 25° and 50°C were extrapolated from the experimental data. 

The vapour pressure of the test item was determined to be 7.5 x 10-2Pa at 20°C, 1.3 x 10-1Pa at 25°C and 1.5 Pa at 50°C.