Reaction mass ofDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN1}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-) andDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN2}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental Starting Date - 05 October, 2015; Experimental Completion - 08 October, 2015; Study Completion Date - 08 October 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

GLP compliance:

no

Type of method:

flask method

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: FAT 20037/E TE, Lot. 1501016

Key result

Water solubility:

55 g/L

Conc. based on:

test mat.

Temp.:

20 °C

Remarks on result:

other: pH not available

Preliminary Visual Estimation of the Water Solubility

Amount of the test item in mg	Total volume in mL	Appearance of mixture
1000	1	undissolved
	5	undissolved
	10	undissolved
	20	undissolved

The preliminary visual experiments showed that the water solubility of the test item is approximately 50 g/L.

Flask-Method

Experiment	A	B	C	D (blank)
Amount of test item [mg]	2500	2500	2500	-
Stirring time at 30 °C [h]	24	48	72	72
Measured concentration [μg/mL]	29.0	26.4	27.1	-
Dilution	0.05mL/10mL/1 mL/10mL	0.05mL/10mL/1 mL/10mL	0.05mL/10mL/ 1 mL/10mL	-
Water solubility [g/L]	58	52.7	54.1	-

Average experiments A to C: 55 g/L

In an experiment to check recovery, a recovery of 101.0 % was obtained, which indicated a sufficient accuracy of the analytical method.

Conclusions:

The water solubility of the test item (without correction for the purity) at a temperature of 20 °C was determined to be 55 g/L.

Executive summary:

The water solubility of the test item was determined in a study conducted according to OECD Guideline 105 and EU Method A.6. Preliminary visual estimation of the water solubility was followed by a main test as per flask method. Based on the findings of the study, the water solubility of the test item (without correction for the purity) at a temperature of 20°C was determined to be 55 g/L.

Description of key information

The water solubility of the test item was determined in a study conducted according to OECD Guideline 105 and EU Method A.6. Preliminary visual estimation of the water solubility was followed by a main test as per flask method. Based on the findings of the study, the water solubility of the test item (without correction for the purity) at a temperature of 20°C was determined to be 55 g/L.

Key value for chemical safety assessment

Water solubility:

55 g/L

at the temperature of:

20 °C