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Physical & Chemical properties

Water solubility

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Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
23 April 2012 - 29 June 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
other: read-across target
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
see below
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
yes
Remarks:
see below
Principles of method if other than guideline:
The standard methodology was not applicable to this test item due to the production of high saturation levels. For visual assessment, samples were required where saturation was not achieved in order to determine the point where saturation was achieved. Therefore, it was impractical to prepare samples at five times the saturation level as recommended in the guidelines.
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Key result
Water solubility:
>= 8 - <= 9.3 other: % w/w
Temp.:
20 °C
pH:
>= 3 - <= 4.9
Details on results:
PRELIMINARY TEST
The sample concentrations, observations and pH values of the solutions are shown in Table 3.
The preliminary water solubility was determined to be in the range 1.1 to 4.8 % w/w.
As this value was above 10^-2 g/L, the flask method was performed for the definitive test.
The somewhat low preliminary results were most likely due to these samples having not attained saturation.

DEFINITIVE TEST
The sample concentrations, observations and pH values of the solutions are shown in Table 4.
Overall, the water solubility was determined to be in the range 8.0 to 9.3 % w/w.

Table 1 Preliminary Test Results

Sample

Concentration

(% w/w)

Observations

Solution

pH

1

4.8

Clear, colourless solution, with small amount of undissolved white solid.

3.3

2

9.1

Clear, colourless solution, with some undissolved white solid.

3.5

3

16.6

Clear, colourless solution, with large amount of undissolved white solid.

3.3

4

1.1

Clear, colourless solution, with no excess test item.

5.1

5

0.14

Clear, colourless solution, with no excess test item.

6.2

6

0.011

Clear, colourless solution, with no excess test item.

6.6

 

Table 2 Definitive Test Results

Sample

Concentration

(% w/w)

Observations

Solution

pH

7

1.0

Clear, colourless solution, with no excess test item.

4.9

8

2.0

Clear, colourless solution, with no excess test item.

4.6

9

2.9

Clear, colourless solution, with no excess test item.

4.4

10

3.9

Clear, colourless solution, with no excess test item.

4.3

11

4.8

Clear, colourless solution, with no excess test item.

4.2

12

6.3

Clear, colourless solution, with no excess test item.

4.2

13

10.1

Clear, colourless solution, with excess test item.

3.4

14

14.1

As Sample 13, except much more excess test item than Sample 13.

3.0

15

18.4

As Sample 13, except much more excess test item than Sample 14.

3.1

16

22.0

As Sample 13, except much more excess test item than Sample 15.

3.1

17

7.1

Clear, colourless solution, with no excess test item.

4.1

18

8.0

Clear, colourless solution, with no excess test item.

3.9

19

9.3

Clear, colourless solution, with excess test item.

3.6

 

Conclusions:
Interpretation of results: very soluble (> 10 000 mg/L)
The water solubility of the test item has been determined to be in the range 8.0 to 9.3 % w/w of solution at 20.0 ± 0.5 °C.
Executive summary:

The evaluation of the water solubility of the test material was carried out using visual appraisal, based on the flask method, designed to be compatible with OECD Guideline 105 and EU Method A.6 under GLP conditions.

The water solubility of the test item has been determined to be in the range 8.0 to 9.3 % w/w of solution at 20.0 ± 0.5 °C.

Endpoint:
water solubility
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
Read-across to structurally similar substance sodium periodate (CAS 7790-28-5). Sodium periodate is the sodium salt of periodic acid.
Reason / purpose for cross-reference:
read-across source
Key result
Water solubility:
>= 8 - <= 9.3 other: % w/w
Temp.:
20 °C
pH:
>= 3 - <= 4.9
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
06 April 2018 to 28 November 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7840 (Water Solubility)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes
Type of method:
other: Visual inspection
Water solubility:
> 1 000 g/L
Conc. based on:
test mat.
Incubation duration:
19 h
Temp.:
20 °C
pH:
0.7
Details on results:
After the stirring period, the test sample was clear and no undissolved test material was observed. It was concluded that the water solubility of the test material at 20 °C was > 1 x 10^3 g/L. The pH of the aqueous sample was 0.7.
Conclusions:
Under the conditions of the test the water solubility of the test material at 20 °C was > 1 x 10^3 g/L.
Executive summary:

The water solubility of the test material was assessed according to EC Guideline A.6., OECD Guideline 105 and EPA Guideline OPPTS 830.7840 in accordance with the principles of GLP by visual inspection.

After the stirring period, the test sample was clear and no undissolved test material was observed. It was concluded that the water solubility of the test material at 20 °C was > 1 x 10^3 g/L. The pH of the aqueous sample was 0.7.

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
not stated
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline available
Principles of method if other than guideline:
Handbook data does not specify the method. Data from peer reviewed source.
GLP compliance:
not specified
Type of method:
other: Handbook data does not specify the method. Data from peer reviewed source.
Key result
Water solubility:
>= 38 other: w/w%
Remarks on result:
completely miscible
Remarks:
The substance is described in the Merck Index as being "freely soluble in water".
Conclusions:
According to the handbook data the substance is freely soluble in water.
Executive summary:

According to the handbook data the substance is freely soluble in water.

Description of key information

Under the conditions of the test the water solubility of the test material at 20 °C was > 1 x 10^3 g/L.  

Key value for chemical safety assessment

Water solubility:
1 000 g/L
at the temperature of:
20 °C

Additional information

Key Study: Lammers (2019)

The water solubility of the test material was assessed according to EC Guideline A.6., OECD Guideline 105 and EPA Guideline OPPTS 830.7840 in accordance with the principles of GLP by visual inspection.

After the stirring period, the test sample was clear and no undissolved test material was observed. It was concluded that the water solubility of the test material at 20 °C was > 1 x 10^3 g/L. The pH of the aqueous sample was 0.7.

Supporting Data:

The evaluation of the water solubility of the read across substance, sodium periodate, was carried out using visual appraisal, based on the flask method, designed to be compatible with OECD Guideline 105 and EU Method A.6 under GLP conditions. The study was assigned a reliability score of 1 in accordance with the principles for assessing data quality as outlined by Klimisch et al (1997), however, since the data is available on a read across substance an overall reliability score of 2 is considered appropriate. Sodium periodate is considered to be a suitable substance for read across since it is the sodium salt of periodic acid.

The water solubility of the read across substance has been determined to be in the range 8.0 to 9.3 % w/w (equivalent to 80 to 93 g/L) of solution at 20.0 ± 0.5 °C.