Registration Dossier
Registration Dossier
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EC number: 229-539-1 | CAS number: 6598-63-6
Endpoint summary
Administrative data
Description of key information
Adsorption/desorption:
The Soil Adsorption Coefficient i.e Koc value of Trisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate (CAS No:6598-63-6) was estimated using EPI suite KOCWIN Program (v2.00) as 10810000 L/kg(log Koc= 7.0338) by means of MCI method at 25 deg.C. This Koc value indicates that the substance Trisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate has very strong sorption to soil and sediment and therefore has negligible migration potential to groundwater.
Additional information
Adsorption/desorption:
Two different predicted data study were done for target chemical Trisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate (CAS No:6598-63-6) and their results are summarized below for adsorption endpoint.
In first study the Soil Adsorption Coefficient i.e Koc value of Trisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate was estimated using Estimation Program Interface (EPI suite, 2017) KOCWIN Program (v2.00) as 10810000 L/kg(log Koc= 7.0338) by means of MCI method at 25 deg.C.
Another study was one from CompTox Chemistry Dashboard using OPERA (OPEn (quantitative) structure-activity Relationship Application) V1.02 model in which calculation based on PaDEL descriptors (calculate molecular descriptors and fingerprints of chemical) the adsorption coefficient i.e KOC for test substanceTrisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate(CAS no. 6598 -63 -6) was estimated to be 137000 L/kg (log Koc = 5.1367) .The predicted KOC result based on the 5 OECD principles.
On the basis of results of both the studies it is concluded that the test substance Trisodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate has a very strong sorption to soil and sediment and therefore has negligible migration potential to ground water.
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