Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Adsorption / desorption

Adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical (authoritative databases, 2017). The adsorption coefficient (Koc) value was calculated using a logKow of 1.83 and a regression derived equation. The adsorption coefficient (Koc) value of test chemical was estimated to be 74 (Log Koc = 1.86). This Koc value indicates that the test chemical has a low sorption to soil and sediment and therefore have moderate migration potential to ground water.

Additional information

Adsorption / desorption

Experimental study and various predicted data of the test chemical were reviewed for the adsorption end point which are summarized as below:

 

In an experimental key study from authoritative database (2017),adsorption experiment was conducted for estimating the adsorption coefficient (Koc) value of test chemical. The adsorption coefficient (Koc) value was calculated using a logKow of 1.83 and a regression derived equation. The adsorption coefficient (Koc) value of test chemical was estimated to be 74 (Log Koc = 1.86).

 

In a prediction done using the BCFBAF Programof Estimation Programs Interface was used to predict the soil adsorption coefficient i.e Koc value of test chemical. The soil adsorption coefficient i.e Koc value of test chemical was estimated to be 120 L/kg (log Koc=2.0791) by means of MCI method (at 25 deg C). This Koc value indicates that the test chemical has a low sorption to soil and sediment and therefore have moderate migration potential to ground water.

 

The Soil Adsorption Coefficient i.e Koc value of test chemical was estimated using Adsorption Coefficient module program as Koc 280 (logKoc = 2.4 ± 1.0) at pH range 1-14, respectively(ACD (Advanced Chemistry Development)/I-Lab predictive module, 2017)).

 

On the basis of above overall results for test chemical (from authoritative and modelling databases,2017), it can be concluded that the logKoc value of test chemicalranges from1.86– 2.4, indicating that the test chemical has a low sorption to soil and sediment and therefore have moderate migration potential to ground water.

 

Waiver statement

In accordance with column 2 of Annex IX of the REACH regulation,testing for this endpointis scientifically not necessary and does not need to be conducted since the test chemicalhas a low potential for adsorption based on low octanol water partition coefficient.