Chromate(5-), bis[4-(hydroxy-κO)-7-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-3-[2-[2-(hydroxy-κO)- 3-nitro-5-sulfophenyl]diazenyl]-2-naphthalenesulfonato(4-)]-, sodium (1:5)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

GLP compliance:

yes

Type of method:

flask method

Key result

Water solubility:

> 400 g/L

Conc. based on:

test mat.

Temp.:

20 °C

Remarks on result:

other: pH not reported

The chromatograms of the pretreated water samples were comparable with the chromatograms of the standard dilutions. During the addition of test substance to water a very viscous dark black/blue solution was formed. The solution contained numerous lumps. After centrifugation of the samples no phase separation was observed. The actual concentration in the water samples appeared to be almost the same as the nominal concentration, i,e. almost all the test substance had dissolved.

At these high concentration levels the test substance forms very viscous mixtures with water that can hardly be stirred. For this reason, no main study was performed.

Conclusions:

The water solubility was estimated to be > 400 g/l.

Executive summary:

In order to evaluate the solubility of the test substance in water, a study was conducted according to the method A.6 of EEC-Directive 92/69 EEC. The concentration of test item was determined using a HPLC method. The water solubility of test item was estimated to be > 400 g/l.

Description of key information

> 400 g/l

Additional information

In order to evaluate the solubility of the test substance in water, a study was conducted according to the method A.6 of EEC-Directive 92/69 EEC.

The water solubility of test item was estimated to be > 400 g/l.