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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other: GLP compliant unpublished guideline study, reliable without restriction
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.:
37 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 4.2 x10-6 hPa
Temp.:
42 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 6.3 x10-6 hPa
Temp.:
45 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 8.5 x10-6 hPa
Temp.:
48 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.3 x10-5 hPa
Temp.:
52 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 1.7 x10-5 hPa
Temp.:
55 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 2.2 x10-5 hPa
Temp.:
59 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Reported as 2.8 x10-5 hPa
Temp.:
20 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Reported as 7.9 x10-5 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Reported as 1.3 x10-4 Pa
Temp.:
50 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: Reported as 1.4 x10-3 Pa

Thermal stability:

 Weight (mg)  Final temperature (°C)  Type of effect  Temperature Range (°C)  Enthalpy (J/g)  Crucible
 11.40  300  exothermal   50 - 85 -26  Closed glass crucible
 11.40  300  endothermal  120 - 140  n.r.  Closed glass crucible
 11.40  300  endotherml  150 - 190  n.r.  Closed glass crucible
 10.64  300  exothermal  50 - 80  -10  Closed glass crucible
 10.64  300  endothermal  120 - 140  n.r.  Closed glass crucible
 10.64  300  endothermal  150 - 195  n.r.  Closed glass crucible

n.r. = not relevent

Conclusions:
The following vapour pressures values were extrapolated from the experimental data (vapour pressure balance method):
20 °C = 7.9 x10-5 Pa
25 °C = 1.3 x10-4 Pa
50 °C = 1.4 x10-3 Pa
Executive summary:

The vapour pressure and thermal stability of Tetrakis(triphenylphosphine)palladium was assessed by the effusion method following the OECD 104 (2006), OECD 113 (1981) and EC No. 440/2008 and No. 761/2009 A.4. Vapour pressure: Vapour pressure balance guidelines. Measured vapour pressure in the temperature range 11 - 33 °C were below the lower detection limit of 10 -5hPa.

The following vapour pressure values were extrapolated from the experimental data (vapour pressure balance method):

20 °C = 7.9 x 10 -5 Pa

25 °C = 1.3 x 10 -4 Pa

50 °C = 1.4 x 10 -3 Pa

The study is GLP compliant unpublished guideline study and is therefore reliable with-out restriction

Description of key information

The vapour pressure values for terakis(triphenylphosphine)palladium have been determined to be 7.9 x 10-5 Pa at 20 °C, 1.3 x 10-4 Pa at 25 °C and 1.4 x 10-3 Pa at 50 °C.

Key value for chemical safety assessment

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

Additional information

Nau (2015) is a GLP compliant study following OECD TG 104, OECD TG 113 and EU method A4 and is considered suitable for use as the key study for this endpoint. The vapour pressure values for terakis(triphenylphosphine)palladium were extrapolated from the experimental data (vapour pressure balance method) as 7.9 x 10-5 Pa at 20 °C, 1.3 x 10-4 Pa at 25 °C and 1.4 x 10-3 Pa at 50 °C.