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Environmental fate & pathways

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Biodegradation in water:

Biodegradability of test chemical Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate) is predicted using OECD QSAR tool box v3.3 using log Kow as primary descriptor. The predicted value for biodegradation of chemical Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate is 1.39 % by considering BOD parameter and microorganisms as inoculum in 28 days.

Additional information

Biodegradation in water:

Predicted data for the target compound Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate (CAS No. 84041 -67 -8) and supporting weight of evidence studies for its closest read across substance with log Kow as a primary descriptor were reviewed for the biodegradation end point which are summarized as below:

Biodegradability of test chemical Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate) is predicted using OECD QSAR tool box v3.3 using log Kow as primary descriptor. The predicted value for biodegradation of chemical Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate is 1.39 % by considering BOD parameter and microorganisms as inoculum in 28 days.

In supporting weight of evidence study from seconadary source ( J check, 2017) for read across chemical dipotassium7-hydroxynaphthalene-1, 3-disulfonate (CAS no. 842-18-2) was done by taking sludge as inoculums at 30 mg/L concentration. Biodegradation was analysed by using BOD parameter. The initial concentration of test chemical was 100 mg/L and study design is of standard type. After 4 weeks test chemical showed 0% biodegradation by BOD parameter.

In another weight of evidence study from similar source as of above for read across chemical 2, 2'-ethene-1,2-diylbis(5-aminobenzenesulfonic acid) ( CAS no. 81-11-8) was done. biodegradation test was carried out by taking sludge as a inoculums at 30 mg/L concentration . Biodegradation was analysed by using two parameters BOD and HPLC. The initial concentration of test chemical was 100 mg/L and study design is of standard type. After 4 weeks( 28 days) test chemical showed 0% and 2 % biodegradation by BOD and HPLC parameters respectively.

On the basis of above results for target chemical Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate (from OECD QSAR tool box v3.3 ) and for its read across substance (from secondary source), it can be concluded that the test substance Dialuminium tris(4-hydroxy-3-((4-sulphonato-1-naphthyl)azo)naphthalenesulphonate can be expected to be not readily biodegradable in nature.