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Description of key information

Adsorption / desorption

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 a logKow of 5.82 and a regression derived equation. The adsorption coefficient (Koc) value of test chemical was estimated to be 35,000 (Log Koc = 4.544). 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 experimental studies and 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 (HSDB and PubChem, 2017) for the target chemical, 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 5.82 and a regression derived equation. The adsorption coefficient (Koc) value of test chemical was estimated to be 35,000 (Log Koc = 4.544). 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.

 

Another adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical (OECD SIDS, 2006). The adsorption coefficient (Koc) value was calculated using a logKow of 5.51 and a QSAR TGD hydrophobic and non-hydrophobic method. The adsorption coefficient (Koc) value of test chemical was estimated to be 7677.1 (Log Koc = 3.89) by TGD-non-hydrophobic method and 36568 (Log Koc = 4.56) by TGD-hydrophobic method, respectively. This Koc value indicates that the test chemical has a strong to very strong sorption to soil and sediment and therefore have negligible to slow migration potential to ground water.

 

In a prediction done by using ChemSpider Database (2017),the Soil Adsorption Coefficient i.e Koc value of test chemical was estimated. The adsorption coefficient (Koc) value of test chemical was estimated to be 36113.19 (Log Koc = 4.557) at both pH 5.5 and 7.4, respectively. 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 soil adsorption coefficient i.e Koc value of test chemical was estimated using the SciFinder database (American Chemical Society (ACS), 2017).The soil adsorption coefficient i.e Koc value of test chemical was estimated to be 21300 at pH range 1-10, respectively (at 25 deg C). 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.

 

In a supporting study from authoritative database (HSDB and PubChem, 2017) for test chemical, adsorption experiment was conducted for estimating the adsorption coefficient (Koc) value of test chemical. The adsorption coefficient (Koc) value was calculated using a water solubility of 0.04122 and a regression derived equation. The adsorption coefficient (Koc) value of test chemical was estimated to be 25000 (Log Koc = 4.397). 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, 2017). The adsorption coefficient (Koc) value was calculated using a logKow of 4.72 and a regression derived equation.The adsorption coefficient (Koc) value of test chemical was estimated to be 8800 (Log Koc = 3.944). 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.

 

In a supporting study for the test chemical from authoritative database (HSDB and PubChem, 2017),adsorption experiment was conducted for estimating the adsorption coefficient (Koc) value of test chemical. The adsorption coefficient (Koc) value was calculated using a structure estimation method based on molecular connectivity indices. The adsorption coefficient (Koc) value of test chemical was estimated to be 44000 (Log Koc = 4.643). 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.

 

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 3.89 to 4.643, respectively, indicating that the test chemical has a strong to very strong sorption to soil and sediment and therefore have negligible to slow migration potential to ground water.