Registration Dossier
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EC number: 203-453-4 | CAS number: 107-02-8
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
Henry’s Law constant (calculated: 6.1 Pa x m³/mol at 20°C;. measured: 3.1 Pa x m³/mol at 20°C and 1.22 x 10E-4 atm x m³/mol at 25°C) indicates that volatilisation from surface waters and moisty soil is expected to be high.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 3.1
- at the temperature of:
- 20 °C
Additional information
1. European Union Risk Assessment Report of Acrolein (EU, 2001)
According to the TGD (1996) a Henry’s Law constant of 6.1 Pa x m³/mol at 20°C can be calculated. A measured Henry’s Law constant of 3.1 Pa x m³/mol at 20°C was found. This indicates that volatilisation from surface waters and moisty soil is expected to be high.
2. Agreement with further international Reports and Studies published after finalisation of the EU Risk Assessment Report 2001
US ATSDR (2007): Based on a measured Henry’s Law constant of 1.22 x 10-4 atm x m³/mol at 25°C, the volatilisation half-life from a model river 1 m deep, flowing 1 m/sec with a wind speed of 3 m/sec was estimated to be 23 hours using the method of Thomas.
3. Substantial disagreements in comparison to further international Reports to European Union Risk Assessment Report 2001
None
4. Additional aspects in further international Reports
None
5. Additional information in newer Studies, not included in the European Union Risk Assessment Report 2001 or further cited international reports
None
6. Conclusions
Henry’s Law constant (calculated: 6.1 Pa x m³/mol at 20°C;. measured: 3.1 Pa x m³/mol at 20°C and 1.22 x 10-4 atm x m³/mol at 25°C) indicates that volatilisation from surface waters and moisty soil is expected to be high.
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