Registration Dossier
Registration Dossier
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EC number: 210-959-9 | CAS number: 626-67-5
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
Significant evaporation of the substance from the water surface into the atmosphere is not expected.
Key value for chemical safety assessment
Additional information
An EPISUITE (v4.10) experimental database structure match indicates that the Henry´s Law constant (HLC, at 25°C) was measured to be 3.51 Pa*m³/mole (BASF, 2011). For the uncharged molecule a similar result of 3.82 Pa*m³/mol was calculated with the bond estimation method by the same programme (EPISUITE v4.10; BASF, 2011). Using the method described in the REACH Guidance Document R7a, Appendix R.7.1-2 (pH correction of partition coefficients for ionisable substances, p. 189), this HLC was corrected for the charged molecule to a value of 0.00317 Pa*m³/mol at pH 7 (BASF, 2011).
In conclusion, the HLC of the uncharged molecule is expected to be < 1 Pa*m³/mol (pH 7, 25°C). Therefore, significant evaporation of the substance from surface water is unlikely.
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