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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

Soil Adsorption Coefficient i.e. Koc value of Benzidine-2,2’-disulphonic acid at 25 deg C was estimated as 584.5 L/kg {Log Koc (2.7668) } by means of MCI method. This indicates that Benzidine-2,2’-disulphonic acid has good adsorption potential to the organic carbon fraction of the soil and have slow migration potential to groundwater.This value at 20 deg C is equivalent to 2.669

Key value for chemical safety assessment

Koc at 20 °C:
467.6

Additional information

Soil Adsorption Coefficient i.e. Koc value of Benzidine-2,2’-disulphonic acid at 25 deg C was estimated as 584.5 L/kg {Log Koc (2.7668) } by means of MCI method. This indicates that Benzidine-2,2’-disulphonic acid has good adsorption potential to the organic carbon fraction of the soil and have slow migration potential to groundwater.This value at 20 deg C is equivalent to 2.669

[LogKoc: 2.669]