Registration Dossier
Registration Dossier
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EC number: 433-260-2 | CAS number: 168253-59-6
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
The substance is characterised by a calculated Henry Law Constant between 7.68 E-5 and 1.15 E-4 Pa m³/mol (Currenta, 2010b). According to Thomas, cited in the "Handbook of Chemical property Estimation Methods" (Lyman, 1980), the substance is less volatile than water. Therefore, the substance has to be scored as being non-volatile from water.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0
- at the temperature of:
- 25 °C
Additional information
The Henry’s law constant (HLC) is directly calculated as the ratio of the vapour pressure (0.001 Pa) to the water solubility (4 to 6 g/L), which are both experimentally determined at 25 °C. The molecular weight (460.56 g/mol) of the substance was also used for the calculation.
As no exact water solubility could be determined, the Henry's Law Constant was calculated for the lower and upper water solubility limit and is thus characterised by a range rather than a single value. According to guidance document R.7a (ECHA, 2008), the estimation based on the vapour pressure and water solubility is acceptable for substances with a water solubility smaller than 1 mol/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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