hydronium;iron(3+);hexahydroxide;disulfate

Henry's Law constant

Description of key information

Not relevant, very low value assumed

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):

0

at the temperature of:

12 °C

Additional information

This endpoint is covered by the category approach for dissociating, inorganic and non-toxic iron compounds (please see the section on physical and chemical properties for the category justification/report format). Volatilisation as expressed by Henry's Law constant is not a relevant property of metals, except organometallic compounds and a few exemptions such as mercury. Since no formation of volatile organometallic iron compounds is assumed, the Henry coefficient should be set to a very low value (i.e. 0.000'004 Pa∙m³/mol according to ECHA 2008, Guidance on information requirements and chemical safety assessment, Appendix R.7.13 -2: Environmental risk assessment for metals and metal compounds, p 12) when needed in calculations.