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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 1
Qualifier:
according to
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
flask method
Test material information:
Composition 1
Remarks on result:
not determinable
Remarks:
As the test item is not stable in water at the concentration used, the water solubility was not determinable.
Details on results:
At the beginning of all experiments, the solutions appeared homogeneous and slightly yellow without precipitate. After equilibration time, no precipitate was observed in the flasks of the 24 h experiment and the blank experiment. In the flasks of the 48 h experiment and the 72 h experiment, a black precipitate was found.

The test item is a complex compound. Regarding the behaviour of the test item, it can be assumed that this complex compound is not stable in water at the concentration used. As the test item was dissolved completely at the beginning of the stirring time, no further analytical determination was performed.

Table 1: Water solubility experiments of the test item

Experiment

24 h experiment

48 h experiment

72 h experiment

Blank

experiment (72 h)

Amount of test item / g

5.01

5.01

5.01

--

Amount of demineralized water / mL

5

5

5

5

Stirring time at 30°C / h

24

48

72

72

pH at 24 - 25°C

13.0

13.0

13.0

6.7

Observation at the beginning of the stirring time

Homogeneous, slightly yellow solution

Homogeneous, slightly yellow solution

Homogeneous, slightly yellow solution

Colourless liquid

Observation after the stirring time

Homogeneous, slightly yellow solution

Slightly yellow solution with black precipitate

Slightly yellow solution with black precipitate

Colourless liquid

Water solubility / g/L

-

-

-

-

Conclusions:
The water solubility of tetraamminepalladium dihydroxide was not determinable as the test item was not stable in water.
Executive summary:

Winkler (2017) is a GLP-compliant study following OECD guideline 105 and EU method A6. It is considered suitable for use as the key study for this endpoint.

Description of key information

The water solubility of tetraamminepalladium dihydroxide was not determinable as the test item was not stable in water.

Key value for chemical safety assessment

Additional information

Winkler (2017) is a GLP-compliant study following OECD guideline 105 and EU method A6. It is considered suitable for use as the key study for this endpoint.