Dichlorobis(triphenylphosphine)palladium

Vapour pressure

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other: GLP compliant unpublished guideline study, reliable with-out restriction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.:

70 °C

Vapour pressure:

0 hPa

Remarks on result:

other: Reported as 1.8 x10-6 hPa

Temp.:

90 °C

Vapour pressure:

0 hPa

Remarks on result:

other: Reported as 3.9 x10-6 hPa

Temp.:

100 °C

Vapour pressure:

0 hPa

Remarks on result:

other: Reported as 3.6 x10-6 hPa

Temp.:

110 °C

Vapour pressure:

0 hPa

Remarks on result:

other: Reported as 3.8 x10-6 hPa

Temp.:

120 °C

Vapour pressure:

0 hPa

Remarks on result:

other: Reported as 4.6 x10-6 hPa

Temp.:

20 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: Reported as 4.6 x10-8 Pa

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: Reported as 8.9 x10-8 Pa

Temp.:

50 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: Reported as 1.8 x10-6 Pa

The results at 20, 25 and 50 °C are conservative estimations. The true vapour pressure is most likely even lower than the value derived from the detection limit.

Thermal stability:

Weight (mg)	Final temperature (°C)	Type of effect	Temperature Range (°C)	Enthalpy (J/g)	Crucible
9.34	300	-	-	-	Closed glass crucible
10.95	300	exothermal	205 - 270	-56	Closed glass crucible

Conclusions:

Measured vapour pressure in the temperature range 70 - 120 °C was below the lower detection limit of vapour pressure balance of 10^-5 hPa.
Assuming the vapour pressure at 120 °C corresponds with the lower detection limit, the following upper limit vapour pressure values were calculated:
20 °C = <4.6 x10-8 Pa
25 °C = <8.9 x10-8 Pa
50 °C = <1.8 x10-6 Pa

Executive summary:

The vapour pressure and thermal stability of Dichlorobis(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 70 - 120 °C was below the lower detection limit of vapour pressure balance of 10^-5 hPa.

Assuming the vapour pressure at 120 °C corresponds with the lower detection limit, the following upper limit vapour pressure values were calculated:

20 °C = <4.6 x10^-8 Pa.

25 °C = <8.9 x10^-8 Pa.

50 °C = <1.8 x10^-6 Pa.

The study is a GLP compliant unpublished guideline study and is therefore reliable without restriction

Description of key information

The vapour pressure values for dichlorobis(triphenylphosphine)palladium have been determined as <4.6 x 10-8 Pa at 20°C, <8.9 x 10-8 Pa at 25 °C and <1.8 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

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. Assuming the vapour pressure at 120°C corresponds to the lower detection limit, the following upper limit vapour pressure values for dichlorobis(triphenylphosphine)palladium were calculated <4.6 x 10^-8 Pa at 20°C, <8.9 x 10 ^-8 Pa at 25°C and <1.8 x 10 ^-6 Pa at 50°C.