Carbonyl(pentane-2,4-dionato-O,O')(triphenylphosphine)rhodium

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other: GLP compliant, guideline study ,available as an unpublished report.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.:

40 °C

Vapour pressure:

0 hPa

Temp.:

60 °C

Vapour pressure:

0 hPa

Temp.:

79 °C

Vapour pressure:

0 hPa

Temp.:

90 °C

Vapour pressure:

0 hPa

Temp.:

99 °C

Vapour pressure:

0 hPa

Temp.:

109 °C

Vapour pressure:

0 hPa

Temp.:

114 °C

Vapour pressure:

0 hPa

Key result

Temp.:

20 °C

Vapour pressure:

< 0 Pa

Key result

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Key result

Temp.:

50 °C

Vapour pressure:

< 0 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
10.00	300	exothermal	140 - 185	-29n.r-89	Closed glass crucible
10.00	300	endothermal	185 - 215	n.r.	Closed glass crucible
10.00	300	exothermal	265 - 300	-89	Closed glass crucible

n.r. = not relevent

Measured vapour pressures and corresponding temperatures (continued from results section):

Temperature (°C)	Vapour pressure (hPa)
120	2.1 x 10 ^-5

Conclusions:

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated; <9.8 x10-8 Pa at 20°C. <1.9 x10-7 Pa at 25 °C and <3.8 x10-6 Pa at 50°C.

Executive summary:

The vapour pressure and thermal stability of carbonyl(pentane-2,4 -dionato-O,O')(triphenylphosphine)rhodium were assessed by the effusion method following the OECD 104 (2006), OECD 113 (1981) and EC No. 440/2008 and No. 761/2009 A.4. The study is a GLP compliant, guideline study and is therefore reliable without restrictions. 

Measured vapour pressure in the temperature range 70 - 109 °C were below the lower detection limit of vapour pressure balance of 10^-5hPa. The measured vapour pressure at 114 °C and 120 °C were only slightly above the detection limit of the method.

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated; <9.8 x10-8 Pa at 20°C. <1.9 x10-7 Pa at 25 °C and <3.8 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; <9.8 x10-8 Pa at 20°C. <1.9 x10-7 Pa at 25 °C and <3.8 x10-6 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 carbonyl(pentane-2,4 -dionato-O,O')(triphenylphosphine)rhodium were assessed by the effusion method following standard test guidelines (Nau 2015). The study is a GLP compliant, guideline study and is therefore reliable without restrictions. 

Measured vapour pressure in the temperature range 70 - 109 °C were below the lower detection limit of vapour pressure balance of 10^-5hPa. The measured vapour pressure at 114 °C and 120 °C were only slightly above the detection limit of the method.

Based on the measured vapour pressure at 120 °C, the following upper limit vapour pressure values were calculated; <9.8 x10-8 Pa at 20°C. <1.9 x10-7 Pa at 25 °C and <3.8 x10-6 Pa at 50°C.