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EC number: 701-171-0 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
One reliable key study is available on the reaction mass of 2,4,6 -tris(1 -phenylethyl)phenol and Bis(1 -phenylethyl)phenol for this endpoint.
In this study (KRACK, 2010), the vapour pressure of a mixture of DSP/TSP has been determined according to the OECD TG 104, the GLP, with the dynamic method and the effusion method.
With the dynamic method, the vapour pressure was measured in the temperature range of 240 °C to 311 °C.The values for 20, 25 and 50 °C were calculated as follows using the Antoine constants:
At 20°C : Vp = 8.1775 x 10E-8 hPa
At 25°C : Vp = 1.7540 x 10E-7 hPa
At 50°C : Vp = 5.2903 x 10E-6 hPa
Due to the extrapolated values being in the measurement range of the vapour pressure balance a second measurement with the vapour pressure balance was performed.
With the effusion method, the vapour pressure was measured in the temperature range of 16 °C to 83 °C, but only above 48 °C a vapour pressure could be measured.The values for 20, 25 and 50 °C were calculated as follows using the Antoine constants:
At 20°C : Vp = 5.35 x 10E-8 hPa
At 25°C : Vp = 1.43 x 10E-7 hPa
At 50°C : Vp = 1.25 x 10E-6 hPa
Due to the broad distribution of the measured values both methods have been evaluated together and the values for 20, 25 and 50 °C were calculated as follows using the Antoine constants:
At 20°C : Vp = 1.04 x 10E-8 hPa
At 25°C : Vp = 4.52 x 10E-8 hPa
At 50°C : Vp = 1.26x 10E-5 hPa
Therefore, the vapour pressure of the mixture of DSP/TSP was determined by extrapolation to be 10E-6 Pa at 20°C and 4.5 x 10E-6 Pa at 25°C.
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