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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Description of key information

Value for assessment has been set to a low value, which reflects the metal kation fugacity

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

This endpoint is covered by the category approach for soluble iron salts (please see the section for physical and chemical properties for the category justification/report format). Testing for this endpoint has been waived as an experiment is considered scientifically unjustified. The value for the assessment has been set to a low value, which reflects the properties of the metal species.

Vapour pressure is not a REACH requirement for the submission item category. In accordance with REACH Annex VII, the vapour pressure study (required in Section 7.5) does not need to be conducted, because the melting point is above 300 °C or the preparation of the waterless test item is not possible. Vapour pressure values available in the literature for the category salts, details of which are presented in section 4.6 of the IUCLID 5 file and/or in the SIAR dossiers (OECD 2004 & 2007), refer to the vapour pressure of water above the solution or hydrated crystalline forms (at elevated temperatures), or possibly degradation products. Such values are not insightful for the normal use of vapour pressure values in hazard and risk assessment. The true vapour pressure is negligibly low.

  • OECD Organisation for Economic Co-operation and Development (2004). Iron Dichloride CAS N° 7758-94-3. SIDS Initial Assessment Report for SIAM 19. United Nations Environment Programme (UNEP) Publications. Berlin, Germany, 19-22 October 2004. 89 p.
  • OECD Organisation for Economic Co-operation and Development (2007). SIDS Initial Assessment Report for SIAM 24. Chemical Category: Iron Salts. Self-published OECD 138 p.