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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other: GLP compliant, guideline study, available as an unpublished report, reliable without restrictions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.:
70 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.7 x10-5 hPa
Temp.:
78 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 5.7 x10-6 hPa
Temp.:
89 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 9.2 x10-6 hPa
Temp.:
100 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 7.8 x10-6 hPa
Temp.:
108 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 9.5 x10-6 hPa
Temp.:
110 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 4.8 x10-5 hPa
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: Reported as 2.2 x10-7 Pa
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: Reported as 4.2 x10-7 Pa
Temp.:
50 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: Reported as 8.4 x10-6 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
 11.13  300  endothermal   200 - 240 n.r.  Closed glass crucible
 11.13  300  exothermal  240 - 280  -201  Closed glass crucible

n.r. = not relevent

Conclusions:
Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated: <2.2 x10-7 Pa at 20°C, <4.2 x10-7 Pa at 25°C and <8.4 x10-6 Pa at 50°C.
Executive summary:

The vapour pressure and thermal stability of di-µ-chlorobis(hapto-1,5 -cylooctadiene)dirhodium(I)palladium was assessed by the effusion method following standard test guidelines. The study is GLP-compliant and follows a standard guideline and is considered to be suitable for use as the key study for this endpoint.

Measured vapour pressure in the temperature range 70 - 109 °C were slightly below the lower detection limit of 10 -5 hPa. The measured vapour pressure at 120°C was only slightly above the detection limit of the method. The data point at 70 °C is most likely caused by volatile impurities at the beginning of measurement.

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated: <2.2 x10-7 Pa at 20°C, <4.2 x10-7 Pa at 25°C and <8.4 x10-6 Pa at 50°C.

Description of key information

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated: <2.2 x 10-7 Pa at 20°C, <4.2 x 10-7 Pa at 25°C and <8.4 x 10-6 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 di-µ-chlorobis(hapto-1,5 -cylooctadiene)dirhodium(I)palladium was assessed by the effusion method following standard test guidelines (Nau 2015). The study is GLP-compliant and follows a standard guideline and is considered to be suitable for use as the key study for this endpoint.

Measured vapour pressure in the temperature range 70 - 109 °C were slightly below the lower detection limit of 10 -5 h Pa. The measured vapour pressure at 120°C was only slightly above the detection limit of the method. The data point at 70 °C is most likely caused by volatile impurities at the beginning of measurement.

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated: <2.2 x10-7 Pa at 20°C, <4.2 x10-7 Pa at 25°C and <8.4 x10-6 Pa at 50°C.