Reaction mass of Cuprate(4-), [μ-[[3,3'-methylenebis[6-[[5-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]benzoato]](8-)]]di-, sodium and copper (2+) pentasodium 2-[2-{2-amino-5-[2-(2,4-disulfophenyl)diazen-1-yl]-4-hydroxyphenyl}diazen-1-yl]-5-({3-carboxy-4-[2-{5-[2-(2,4-disulfophenyl)diazen-1-yl]-4-hydroxy-2-oxidophenyl}diazen-1-yl]phenyl}methyl)benzoate and sodium chloride

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

December 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Test material

Test material information

Constituent 1

Reference substance name:

Reaction mass of Cuprate(4-), [μ-[[3,3'-methylenebis[6-[[5-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]benzoato]](8-)]]di-, sodium and copper(2+) disodium 5-[(3-carboxyphenyl)methyl]-2-[2-{4-hydroxy-2-oxido-5-[2-(4-sulfophenyl)diazen-1-yl]phenyl}diazen-1-yl]benzoate” and sodium chloryde

EC Number:

948-009-7

Molecular formula:

Not applicable for a multi-constituent substance

IUPAC Name:

Reaction mass of Cuprate(4-), [μ-[[3,3'-methylenebis[6-[[5-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]benzoato]](8-)]]di-, sodium and copper(2+) disodium 5-[(3-carboxyphenyl)methyl]-2-[2-{4-hydroxy-2-oxido-5-[2-(4-sulfophenyl)diazen-1-yl]phenyl}diazen-1-yl]benzoate” and sodium chloryde

Test material form:

solid: particulate/powder

Details on test material:

Acid brown 161 batch no. ID151860 CAS no. 85338-16-5
Composition of the muti-constituent substance is included in the report as an extract of the analytical report.

Specific details on test material used for the study:

The following information of the test substance was provided by the sponsor.
Name Acid Brown 161
Batch no. ID151860
Composition see extract of analytical report
CAS No. 85338-16-5
Purity see extract of analytical report
Expiry date 01. Oct. 2019
Storage Room Temperature (20 ± 5°C)

Results and discussion

Water solubility

Key result

Water solubility:

ca. 25.26 g/L

Conc. based on:

test mat.

Temp.:

20.3 °C

pH:

ca. 9.87

Applicant's summary and conclusion

Conclusions:

The solubility of Acid Brown 161 in water was determined from the measured concentrations of the test item in the filtrated test solutions.
For the test, 150 g/L test item were used to prepare a saturated solution as the water solubility detected in the pre-test was approx. 28 g/L (in the guideline, fivefold saturation is proposed). To determine the dependency of the water solubility on the amount of the test item added, six different loading rates in the range of 150 – 300 g/L were chosen. A dependency of solubility on the amount of the test item (nominal load) was not perceived in the main test. Therefore, all measurements were included in the calculation of the mean: 25.26 ± 0.6 g/L, corresponding to the RSD of 2.4 %.
No observations arousing doubts concerning the accuracy of the results and the validity of the study were made.