Trisodium bis[3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulphonato(3-)]chromate(3-)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

May 20, 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Test conducted according to internationally accepted testing guidelines.

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Type of method:

flask method

Water solubility:

ca. 266 330 mg/L

Temp.:

20 °C

pH:

ca. 6.15

Remarks on result:

other: pH satured solution 6.16

Details on results:

Reference solutions were measured in the spectrophotometer in quantitative mode, thus generating a calibration curve. Calibration curve was smooth and linear at every concentration. Considering that preliminary test resulted in an absorbance keeping the same shape like the references, its value was considered for the 24 hours’ measurement.

Results:

Test 1 (24 hs)	262.96	g/l
Test 2 (48 hs)	270.37	g/l
Test 3 (96 hs)	265.64	g/l
Average solubility	266.33	g/l
Standard deviation	3.75
pH mother solution	6.15
pH saturated solution	6.16

 

Conclusions:

Interpretation of results: very soluble (> 10000 mg/L)
The water solubility of the tested substance is 266330 mg/l at 20 °C.

Executive summary:

Method:

The substance has been tested for water solubility according to the flask method as reported in the OECD 105 Guideline.

Results:

The water solubility of the substance is 266330 mg/l. The substance is soluble in water.

Description of key information

266330 mg/l

Key value for chemical safety assessment

Water solubility:

266 330 mg/L

at the temperature of:

20 °C

Additional information

OECD guideline 105.