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Environmental fate & pathways

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Description of key information

Adsorption / desorption

KOCWIN model of 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 698300000 L/kg (log Koc=8.8441) by means of MCI method (at 25 deg C). This Koc value indicates that the test chemical has a very strong sorption to soil and sediment and therefore have negligible migration potential to ground water.

Additional information

Adsorption / desorption

Various predicted data of the test chemical were reviewed for the adsorption end point which are summarized as below:

 

In aprediction done using theKOCWIN 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 698300000 L/kg (log Koc=8.8441) by means of MCI method (at 25 deg C). This Koc value indicates that the test chemical has a very strong sorption to soil and sediment and therefore have negligible 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 6350, 189780, 719394, 884291, 903974, 905980, 906181, 906201 and 906203 at pH range 0, 1, 2, 3, 4, 5, 6, 7 and 8-14, respectively (logKoc ranges from 3.8 ± 1.0 to 6.0 ± 1.0) (ACD (Advanced Chemistry Development)/I-Lab predictive module, 2017)). The logKoc value (at pH 7.0) indicates that the test chemical has a very strong sorption to soil and sediment and therefore have negligible migration potential to ground water.

 

Additional soil adsorption coefficient i.e Koc value of test chemicalwas estimated using the SciFinder database (2017).The soil adsorption coefficient i.e Koc value of test chemical was estimated to be 3650, 16100, 20400, 20900 and 21000 at pH range 1, 2, 3, 4 and 5-10, respectively (at 25 deg C) (logKoc value ranges from 3.562 to 4.322). This Koc value indicates that the test chemical has a strong sorption to soil and sediment and therefore have negligible to slow migration potential to ground water.

 

For the test chemical, adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical (HSDB and PubChem, 2017). The adsorption coefficient (Koc) value was calculated using an experimental water solubility of 0.0179 mg/l and a regression derived equation. The adsorption coefficient (Koc) value of test substance was estimated to be 40000 (Log Koc = 4.6). This Koc value indicates that the test substance has a very strong sorption to soil and sediment and therefore have negligible migration potential to ground water.

 

On the basis of above overall results for test chemical, it can be concluded that the log Koc value of test chemical was estimated to be ranges from 3.562 to 8.8441, respectively, indicating that the test chemicalhas a strong to very strong sorption to soil and sediment and therefore have negligible to slow migration potential to ground water.