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Physical & Chemical properties

Water solubility

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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
Reference:
Composition 0
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
Test material information:
Composition 1
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