Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Adsorption/desorption:

The Soil Adsorption Coefficient i.e. Koc value of test chemical  was estimated using EPI suite KOCWIN Program (v2.00) as 70400.L/kg (log Koc= 4.847) by means of MCI method at 25 deg. C.  This log Koc value indicates that test chemical  has very strong sorption to soil and therefore test chemical has  negligible migration potential to ground water.

Additional information

Adsorption/desorption:

Different predicted data study for test chemical and experimental studies for its read across chemicals have been reviewed for adsorption /desorption endpoint and their results are summarized below.

 

In first study the Soil Adsorption Coefficient i.e. Koc value of test chemical was estimated using EPI suite KOCWIN Program (v2.00) as 70400.L/kg (log Koc= 4.847) by means of MCI method at 25 deg. C.  

 

From CompTox Chemistry Dashboard using OPERA (OPEn (quantitative) structure-activity Relationship Application)  V1.02 model in which calculation based on PaDEL descriptors (calculate molecular descriptors and fingerprints of chemical)  the adsorption coefficient i.e KOC for test substance was estimated to be 9220 L/kg ( log koc=3.9647) .The predicted KOC result was based on the 5 OECD principles.

 

The next Adsorption study 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 substance was estimated to be 230000 (Log Koc = 5.361).

 

Another adsorption study 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 substance was estimated to be 130000 (Log Koc = 5.113).

 

By considering results of all the studies mentioned above it is concluded the log Koc value of test chemical is expected to be in range of 3.9- 5.3 and this range value indicates that the test chemical has a very strong sorption to soil and sediment and therefore has negligible migration potential to ground water.