4,4'-[(6-chloro-1,3,5-triazine-2,4-diyl)diimino]bis[5-hydroxy-6-[[4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonic] acid, sodium salt

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05 December 2012 to 28 March 2013

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:

84/449/EWG, appendix V

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

GLP compliance:

yes

Type of method:

flask method

Water solubility:

> 1 000 g/L

Conc. based on:

test mat.

Temp.:

20 °C

Remarks on result:

other: pH not tested

Table 1

Appearance of the test item in the stirring test. 10 ml demineralized water was submitted.

Additional weight in [g]	Visual description
2.12	clear solution
1.03	clear solution
1.24	clear solution
1.00	clear solution
1.86	clear solution
1.63	clear solution
1.05	clear solution
Sum 9.93 (limit case)	clear solution high viscous

 

Table 2

 Appearance of the test item in the stirring test.

Submitted weight in	Visual description	Visual description
Flask A / 5 g	after 30 min clear solution	after 24 hours clear solution
Flask B / 7 g	after 30 min clear solution	after 24 hours clear solution
Flask C / 8 g	after 30 min clear solution	after 24 hours clear solution
Flask D / 9 g	after 30 min clear solution slight viscous	after 24 hours clear solution slight viscous
Flask E / 10 g	after 60 min clear solution high viscous	after 24 hours clear solution high viscous

 

Conclusions:

A saturated solution (solution with residue) of the test item Reactive Red 230 could not be prepared because the test mixture at a concentration of 1000 g/L is a high viscous solution.
A higher concentration with an excess of the test item could not be stirred.
Due to this fact, the water solubility is reported from the preliminary screening.
The water solubility of Reactive Red 230 is > 1000 g/L.

Executive summary:

In a first preliminary test 10 mL of demineralized water was submitted into an Erlenmeyer flask. Then approx. 2 g of the test item was stirred until a clear solution was received.

This process was repeated (stepwise addition of approx. 1 g) until the added amount get a concentration of 1000 g/L.

In a second preliminary test, the test item was weighed (5, 7, 8, 9, 10 g each) into separate Erlenmeyer flasks (A through E).

Then 10 mL demineralized water was added to each flask and the mixtures were stirred for 24 hours.

The behavior of the solutions as a function of time has been observed.

After 24 hours the limit case concentration (1000 g/L) of the test item Reactive Red 230 was a high viscous clear solution.

Description of key information

Water solubility > 1000 g/L

Key value for chemical safety assessment

Water solubility:

1 000 g/L

at the temperature of:

20 °C

Additional information

The water solubility of Reactive Red 230 is > 1000 g/L.