Registration Dossier
Registration Dossier
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EC number: 224-699-9 | CAS number: 4454-16-4
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- GLP compliance:
- yes
- Type of method:
- flask method
- Water solubility:
- 110 mg/L
- Temp.:
- 30 °C
- pH:
- >= 5.79 - <= 6.07
- Remarks on result:
- other: See table 1
- Water solubility:
- 357 mg/L
- Temp.:
- 30 °C
- pH:
- >= 5.48 - <= 5.51
- Remarks on result:
- other: See table 1
- Conclusions:
- Interpretation of results (migrated information): moderately soluble (100-1000 mg/L)
Solubility was based on measurement of dissolved Ni. For pure Ni-EHA, solubility in water was 110 mg/l. The presence of Ni-Acetate in sample OCTNI Base caused a higher figure for total water solubility, probably because all Ni-Acetate had dissolved in the super-saturated solution of 1 g/L. Hence, the contribution of Ni-Acetate to the total dissolved nickel was a magnitude higher than based on the original composition of the sample.
Reference
Table 1:
| Concentration (g/l) | |||
| Sample | Nominal | Dissolved Ni | [NiEHA] |
| OCTNI 169 | 1.042 | 0.0165 | |
| 1.072 | 0.0192 | ||
| 1.054 | 0.0185 | ||
| average: | 0.0181 | 0.110 | |
| OCTNI Base | 1.028 | 0.0597 | |
| 1.038 | 0.0524 | ||
| 1.022 | 0.0577 | ||
| average: | 0.0566 | 0.357 | |
Description of key information
Water solubility based on dissolved Nickel was 110 mg/L for the pure substance without impurities, and 357 mg/L for a typical sample with 6% of Nickel acetate present.
Key value for chemical safety assessment
- Water solubility:
- 110 mg/L
- at the temperature of:
- 30 °C
Additional information
Water solubility of samples from pure Nickel 2-ethylhexanoate was used as the key value for 100% Nickel 2-ethylhexanoate and 0% Nickel acetate, and was determined in a GLP study following the OECD guideline no 105. The presence of Nickel acetate in sample caused a higher figure for total water solubility, probably because all Nickel acetate had dissolved in the super-saturated solution of 1 g/L. As solubility was based on measurement of dissolved Ni, contribution of Nickel acetate to dissolved nickel was a magnitude higher than based on the original composition of the sample.
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