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Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2021-03-15 until 2021-05-5
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- Adopted : 23 March 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air), Adopted: 12 May 1981
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- dynamic method
- Remarks:
- vapour-liquid equilibrium
- Temp.:
- 50 °C
- Vapour pressure:
- 15.2 Pa
- Remarks on result:
- other: calculated by extrapolation of the measured vapour pressure curve
- Temp.:
- 25 °C
- Vapour pressure:
- 2 Pa
- Remarks on result:
- other: calculated by extrapolation of the measured vapour pressure curve
- Temp.:
- 20 °C
- Vapour pressure:
- 1.3 Pa
- Remarks on result:
- other: calculated by extrapolation of the measured vapour pressure curve
- Transition / decomposition:
- yes
- Transition temp.:
- 210 °C
- Remarks on result:
- other: see remark
- Remarks:
- exothermic effect observed in the DSC run starting at a temperature of approx. 210 °C with an energy release of -20 J/g
- Conclusions:
- The vapour pressure of 'reaction products of m-cresol and propene, high boiling alkylphenol isomers' was determined to be 1.3 Pa @ 20°C, 2.0 Pa @ 25 °C and 15.2 Pa @ 50°C.
- Executive summary:
For the test item 'reaction products of m-cresol and propene, high boiling alkylphenol isomers' a vapour pressure curve with 8 data points was measured over a pressure range between 30 to 67 hPa and in the temperature range of 142.3 to 160.6 °C. The determination of the vapour pressure was performed via a dynamic method (vapour-liquid equilibrium). For control 3 measuring points were evaluated with decreasing pressure. The measurement was performed according to Regulation (EC) No 440/2008 Method A.4. and OECD Test Guideline 104 (2006). The vapour pressure for the temperatures 20, 25 and 50 °C were calculated by extrapolation of the measured vapour pressure curve. The calculated vapour pressure values were 1.3 Pa @ 20°C, 2.0 Pa @ 25 °C and 15.2 Pa @ 50°C. The thermal stability was investigated by a DSC run up to 300 °C with a heating rate of 3 K/min. The test item showed an exothermic effect starting at a temperature of approx. 210 °C with an energy release of -20 J/g.
Reference
Dynamic method: Vapour pressure equilibrium
The vapour pressure was measured in the range of 142.3 to 160.6 °C. The measured vapour pressure values together with the measured temperatures are listed in the table below:
Table 1: Results of the dynamic method
| Temperature [°C] | Vapour pressure [hPa] | Remark |
| 142.3 | 30.4 | measured up |
| 147.7 | 40.1 | measured up |
| 152.0 | 50.7 | measured up |
| 157.3 | 60.3 | measured up |
| 160.6 | 67.3 | measured up |
| 156.1 | 54.8 | measured down |
| 152.3 | 45.3 | measured down |
| 145.3 | 35.3 | measured down |
Description of key information
For the test item 'reaction products of m-cresol and propene, high boiling alkylphenol isomers' a vapour pressure curve with 8 data points was measured over a pressure range between 30 to 67 hPa and in the temperature range of 142.3 to 160.6 °C. The determination of the vapour pressure was performed via a dynamic method (vapour-liquid equilibrium). For control 3 measuring points were evaluated with decreasing pressure. The measurement was performed according to Regulation (EC) No 440/2008 Method A.4. and OECD Test Guideline 104 (2006). The vapour pressure for the temperatures 20, 25 and 50 °C were calculated by extrapolation of the measured vapour pressure curve. The calculated vapour pressure values were 1.3 Pa @ 20°C, 2.0 Pa @ 25 °C and 15.2 Pa @ 50°C. The thermal stability was investigated by a DSC run up to 300 °C with a heating rate of 3 K/min. The test item showed an exothermic effect starting at a temperature of approx. 210 °C with an energy release of -20 J/g.
Key value for chemical safety assessment
- Vapour pressure:
- 2 Pa
- at the temperature of:
- 25 °C
Additional information
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