7-[[2-[(aminocarbonyl)amino]-4-[[4-chloro-6-[[4-[vinylsulphonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]phenyl]azo]naphthalene-1,3,6-trisulphonic acid, sodium salt

Adsorption / desorption

Description of key information

From EPI suite prediction model the soil adsorption coefficient (Koc) value of1,3,6-Naphthalenetrisulfonic acid, 7-((2-((aminocarbonyl)amino)-4-((4-chloro-6-((4-(ethenylsulfonyl)phenyl)amino)-1,3,5-triazin-2-yl)amino)phenyl)azo)-, sodium salt is estimated to be 25780000 L/kg (Log Koc=7.41128) indicating that it is has a high sorption to soil and  sediment and therefore have negligible migration i.e. non mobile potential to groundwater.

Key value for chemical safety assessment

Koc at 20 °C:

25 780 000

Additional information

Various data for the test compound 1,3,6-Naphthalenetrisulfonic acid, 7-((2-((aminocarbonyl)amino)-4-((4-chloro-6-((4-(ethenylsulfonyl)phenyl)amino)-1,3,5-triazin-2-yl)amino)phenyl)azo)-, sodium salt (CAS No. 94158-80-2) and the study for its read across substance was reviewed for the adsorption end points which are summarized as below:

From EPI suite prediction model the soil adsorption coefficient (Koc) value of1,3,6-Naphthalenetrisulfonic acid, 7-((2-((aminocarbonyl)amino)-4-((4-chloro-6-((4-(ethenylsulfonyl)phenyl)amino)-1,3,5-triazin-2-yl)amino)phenyl)azo)-, sodium salt is estimated to be 25780000 L/kg (Log Koc=7.41128) indicating that it is has a high sorption to soil and sediment and therefore have negligible migration i.e. non mobile potential to groundwater.

Other read across substance Direct Yellow 50 (Cas no. 3214-47-9)study suggest the Removal of direct dyes direct yellow 50 (DY50) from an aqueous solution by different adsorbents such as activated carbon, raw kaolinite and montmorillonite was investigated.Parameters of the Langmuir isotherm have been determined using the adsorption data.

The adsorption isotherm data were fitted to the Langmuir isotherm. Parameters of the Langmuir isotherm have been determined using the adsorption data.The maximum wavelengths (λmax) and extinction coefficients (ε) of prepared dye solution was determined.The equilibrium concentrations of dyes were determined by a UV-visible spectrometer (Shimadzu UV 160).

At the end of the experiment it is observed that the Maximum adsorption capacities for test substance Direct Yellow 50 (DY50)of the adsorbents increased and followed the order: RAC>KC>HAC>MC (no absorption) with removal % as 97,30,8 and no adsorption respectively. (Polish Journal of Environmental Studies Vol. 15, No. 1 (2006), 155-161)

Wheras other experimental study from Baghdad Science Journal;Vol.12(1)2015 for same read across indicate that the organoclay is an effective adsorbent for the removal of synthetic yellow dye DY50 from aqueous solutions. The amount of dye adsorbed is dependent on amount of the adsorbent USED and increased slightly in lower pH (pH = 3), in the studied dye concentration range. With the increase in the temperature, the amount adsorbed dye increased, indicating that the adsorption of dye onto organoclay is an endothermic process. The best correlation was obtained using the pseudo-second -order, second-order kinetic model. Equilibrium data were also fitted well to the Freundlich isotherm model for low initial dye concentrations.

Thus based on the above available data it is concluded that the test substance 1,3,6-Naphthalenetrisulfonic acid, 7-((2-((aminocarbonyl)amino)-4-((4-chloro-6-((4-(ethenylsulfonyl)phenyl)amino)-1,3,5-triazin-2-yl)amino)phenyl)azo)-, sodium salt (CAS No. 94158-80-2) have tendency to high adsorption in soil.

[LogKoc: 7.411]