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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

FeCl3: Anhydrous ca. 2.9; Hexahydrate ca. 1.8, solution (40 %) 1.4

Key value for chemical safety assessment

Relative density at 20C:

Additional information

A number of densities, relative densities and bulk densities are available from the literature for different hydration states and solutions. The data on bulk density comprise 1000 kg FeCl3/m³ (BASF 1988). The following table gives an overview on the remaining information.

Table: Relative densities or densities [g/cm³] under standard pressure (ISO 5011, i.e. 101.3 kPa)

Category member, Molecular Formula  Anhydrous form Solid hydrate form Aqueous solution
Ferric chloride, FeCl3 2.90 at 4-25 °C Hexahydrate (CAS 10025-77-1): 1.8 at 20 °C 1.42 at 20 °C, 40 %

  • BASF AG (1988). Safety data sheet: Anhydrous iron chloride (2/88). Self-publishe