Registration Dossier
Registration Dossier
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EC number: 221-950-4 | CAS number: 3290-92-4
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Experimental vapour pressure determined over range 48.3-76.0°C enabled to derive a regression equation.
Key value for chemical safety assessment
- Vapour pressure:
- 0.01 Pa
- at the temperature of:
- 30 °C
Additional information
Equation: log p vs 1/T, Slope -4182.2117, Intercept 11.8040. By extrapolation outside the experimental range, this notably gives 0.00345 Pa at 20°C and 0.0102 at 30°C.
For the purpose of inhalative exposure assessment:
- the key value has been chosen at 30°C because there is a change in ECETOC-TRA volatility band (cut-off 0.01 Pa between bands "negligible" and "low") at 29.9°C
- the next change in volatility band ("low" -> "medium") occurs at ~186°C, which is far above the decomposition temperature (>160°C, see Boiling point): this evidences that ECETOC-TRA estimates will be conservative whatever the use temperature.
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