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EC number: 238-744-5 | CAS number: 14694-95-2
Vapour pressure
Administrative data
Link to relevant study record(s)
- 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- other: GLP compliant, guideline study, available as an unpublished report, reliable without restrictions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.:
- 35 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 4.5 x10-6 hPa
- Temp.:
- 40 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 4.7 x10-6 hPa
- Temp.:
- 45 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 5.4 x10-6 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 7.1 x10-6 hPa
- Temp.:
- 55 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 6.2 x10-6 hPa
- Temp.:
- 60 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 5.4 x10-6 hPa
- Temp.:
- 65 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: Reported as 7.0 x10-6 hPa
- Temp.:
- 20 °C
- Vapour pressure:
- < 0 Pa
- Remarks on result:
- other: Reported as <1.6 x10-6 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- < 0 Pa
- Remarks on result:
- other: Reported as <3.0 x10-6 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- < 0 Pa
- Remarks on result:
- other: Reported as <6.0 x10-5 Pa
- Conclusions:
- Based on the measured vapour pressure at 80 °C, the following upper limit vapour pressure values were calculated: <1.6 x10-6 Pa at 20°C, <3.0 x10-6 Pa at 25°C and <6.0 x10-5 Pa at 50°C.
- Executive summary:
The vapour pressure and thermal stability of tris(tripheylphosphine) rhodium (I) chloride was assessed by the effusion method standard vapour pressure balance test guidelines. The study is GLP compliant and follows a standard guideline study and is therefore reliable without restrictions.
Measured vapour pressure in the temperature range 35 - 70 °C were below the lower detection limit of the vapour pressure balance of 10-5 hPa. The measured vapour pressure at 75 °C and 80 °C were only slightly above the detection limit of the method.
Based on the measured vapour pressure at 80 °C, the following upper limit vapour pressure values were calculated: <1.6 x10-6 Pa at 20°C, <3.0 x10-6 Pa at 25°C and <6.0 x10-5 Pa at 50°C.
Reference
The results at 20, 25 and 50 °C are conservative estimations.
Thermal stability:
| Ident-No. | Weight (mg) |
Final temperature (°C) | Type of effect | Temperature Range (°C) | Enthalpy (J/g) | Crucible |
| 34841 | 8.61 | 300 | exothermal | 70 - 110 | -25 | Closed glass crucible |
| 34841 | 8.61 | 300 | endothermal | 200 - 235 | n.r. | Closed glass crucible |
| 34841 | 8.61 | 300 | exothermal | 245 - 280 | -24 | Closed glass crucible |
n.r. = not relevent
Measured vapour pressures and corresponding temperatures (continued from results section):
| Temperature (°C) | Vapour pressure (hPa) |
| 70 | 7.8 x 10 -6 |
| 75 | 1.1 x 10 -5 |
| 80 | 1.2 x 10 -5 |
Description of key information
Based on the measured vapour pressure at 80°C, the following upper limit vapour pressure values were calculated: <1.6 x10-6 Pa at 20°C, <3.0 x10-6 Pa at 25°C and <6.0 x10-5 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 tris(tripheylphosphine) rhodium (I) chloride was assessed by the effusion method standard vapour pressure balance test guidelines (Nau 2015). The study is GLP compliant and follows a standard guideline and is therefore reliable without restrictions.
Measured vapour pressure in the temperature range 35 - 70 °C were below the lower detection limit of the vapour pressure balance of 10-5 hPa. The measured vapour pressure at 75 °C and 80 °C were only slightly above the detection limit of the method.
Based on the measured vapour pressure at 80 °C, the following upper limit vapour pressure values were calculated: <1.6 x10-6 Pa at 20°C, <3.0 x10-6 Pa at 25°C and <6.0 x10-5 Pa at 50°C.
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