Registration Dossier
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EC number: 234-744-4 | CAS number: 12030-85-2
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- transformation / dissolution of metals and inorganic metal compounds
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2107-08-08
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- flask method
- Key result
- Type of test:
- other: Determination of mass concentration in aqueous solution.
- Mean dissolved conc.:
- 143 mg/L
- Element analysed:
- Niobium
- Loading of aqueous phase:
- 20 g/L
- Incubation duration:
- 72 h
- Test conditions:
- Temperature: 30 °C; pH: approx. 11
- Key result
- Type of test:
- other: Determination of mass concentration in aqueous solution.
- Mean dissolved conc.:
- 441 mg/L
- Element analysed:
- Potassium
- Loading of aqueous phase:
- 20 g/L
- Incubation duration:
- 72 h
- Test conditions:
- Temperature: 30 °C; pH: approx. 11
- Details on results:
- The water solubility of potassium (K) is 441 mg/l at 30 ºC.
The water solubility of niobium (Nb) is 143 mg/l at 30 ºC.
The difference in water solubility is based on the precipitation of Nb. - Conclusions:
- The water solubility of potassium (K) is 441 mg/L and of niobium (Nb) 143 mg/L at 30 ºC.
- Executive summary:
The water solubility of the test item potassium niobate was determined according to OECD Guideline 105 using the flask method and inductively coupled plasma optical emission spectrometry (ICP OES).
The water solubility of potassium (K) is 441 mg/L and of niobium (Nb) 143 mg/L at 30 ºC.
Reference
Table 1 summarises results on water solubility of potassium niobate.
Table 1: Results on water solubility of potassium niobate
Equilibration time |
Temperature |
pH |
Nb [mg/L] |
K [mg/L] |
|||||
1st |
2nd |
1st |
2nd |
mean |
1st |
2nd |
mean |
||
24 h |
30 °C |
10.9 |
10.9 |
122 |
119 |
121 |
423 |
421 |
422 |
48 h |
30 °C |
10.9 |
10.9 |
125 |
131 |
138 |
439 |
435 |
437 |
72 h |
30 °C |
10.7 |
10.7 |
141 |
143 |
142 |
441 |
436 |
438 |
Description of key information
The water solubility of the test item potassium niobate was determined according to OECD Guideline 105 using the flask method and inductively coupled plasma optical emission spectrometry (ICP OES).
The water solubility of potassium (K) is 441 mg/L and of niobium (Nb) 143 mg/L at 30 ºC.
Key value for chemical safety assessment
- Water solubility:
- 441 mg/L
- at the temperature of:
- 30 °C
Additional information
The difference in water solubility is based on the precipitation of Nb.
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