Potassium sodium amino-hydroxy-[(3-{[2-(substituted)ethyl]sulfonyl}phenyl)diazenyl]-[(2-sulfonato-4-{[2-(substituted)ethyl]sulfonyl}phenyl)diazenyl]naphthalene-disulfonate

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

The study was conducted between 23 October 2014 and 01 July 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

Principles of method if other than guideline:

As per the above mentioned guidelines

GLP compliance:

yes

Type of method:

flask method

Specific details on test material used for the study:

None

Water solubility:

541 g/L

Conc. based on:

test mat.

Temp.:

20 °C

Remarks on result:

other: Greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20 °C.

Details on results:

Overall result: Greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20.0 ± 0.5 °C.

The sample concentration, observations and solution pH for each sample are shown in the following table:

Sample	Concentration (% w/w)	Observations	Solution pH
1	5.3	Dark blue / black, very mobile liquid	5.6
2	24.7	Dark blue / black, very mobile liquid	*
3	50.3	Dark blue / black, highly viscous liquid, plus a large lump of undissolved material	*
4	10.2	Dark blue / black, very mobile liquid	4.9
5	15.0	Dark blue / black, very mobile liquid	4.8
6	20.0	Dark blue / black, very mobile liquid	5.0
7	30.0	Dark blue, highly mobile liquid	4.6
8	35.1	Dark blue / black, highly mobile liquid	4.3
9	40.0	Dark blue / black liquid. Significantly more viscous than Samples 7 and 8	*

* Not performed, typically due to lack of enough solution phase.

Conclusions:

The water solubility of the test item has been determined to be greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20.0 ± 0.5 °C.

Executive summary:

The water solubility of the test substance was investigated in a study conducted according to OECD Guideline 105 and EU Method A.6. Flask method was used for this purpose. Based on the findings of the study, the water solubility of the test substance was determined to be greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20.0 ± 0.5 °C.

Description of key information

The water solubility of the test substance was determined to be greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20.0 ± 0.5 °C.

Key value for chemical safety assessment

Water solubility:

541 g/L

at the temperature of:

20 °C

Additional information

The water solubility of the test substance was investigated in a study conducted according to OECD Guideline 105 and EU Method A.6. Flask method was used for this purpose. Based on the findings of the study, the water solubility of the test substance was determined to be greater than 35.1 % w/w of solution (equivalent to greater than 541 g/L of water) at 20.0 ± 0.5 °C.