Registration Dossier
Registration Dossier
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EC number: 232-001-9 | CAS number: 7783-49-5
Water solubility
Administrative data
Link to relevant study record(s)
- 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).
Reference
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
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