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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Water solubility

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
water solubility
Type of information:
other: Handbook data, read across to ZnF2 * 4H2O
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Handbook data
GLP compliance:
not specified
Type of method:
other: no data
Key result
Water solubility:
15.5 g/L
Conc. based on:
test mat.
Temp.:
25 °C
Remarks on result:
other: no pH value given
Conclusions:
The water solubility of zinc difluoride tetrahydrate (ZnF2 * 4 H2O) is 15.5 g/L at 25°C (no pH value stated).

Description of key information

The water solubility of zinc difluoride (ZnF2) is 5.2 mg/L at room temperature (no pH value stated; 20°C assumed).

The water solubility of zinc difluoride tetrahydrate (ZnF2 * 4 H2O) is 15.5 g/L at 25°C (no pH value stated).

Under regulation (EC) 1907/2006 there is a need to registere the anhydrous substance. Zinc difluoride (anhydrous) is slightly soluble (5.2 mg/L at 20°C) whereas zinc difluoride tetrahydrate is very soluble in water (15.5 g/L at 25°C). As the anhydrous substance is neither manufactured nor marked for read-across purposes and the hazard assessment the water solubility of zinc difluoride tetrahydrate is used.

Key value for chemical safety assessment

Water solubility:
15.5 g/L
at the temperature of:
25 °C

Additional information