Registration Dossier
Registration Dossier
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EC number: 258-964-5 | CAS number: 54079-53-7
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Justification for type of information:
- Data is from handbook and secondary source
- Qualifier:
- according to guideline
- Guideline:
- other: as mentioned below
- Principles of method if other than guideline:
- Estimation of soil adsorption coefficient (Koc) of test chemical.
- GLP compliance:
- not specified
- Type of method:
- other: No data available
- Media:
- soil
- Radiolabelling:
- not specified
- Analytical monitoring:
- not specified
- Key result
- Type:
- Koc
- Value:
- 1 995 262.3 dimensionless
- Temp.:
- 25 °C
- Remarks on result:
- other: logKoc = 6.3
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The adsorption coefficient (Koc) value of test chemical was estimated to be 1995262.3 dimensionless at 25°C.
- Executive summary:
Adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical. The adsorption coefficient (Koc) value of test chemical was estimated to be 1995262.3 dimensionless (Log Koc = 6.3) at 25°C. This Koc value indicates that the test chemical hasa very strong sorption tosoil and sediment and therefore have negligible migration potential to ground water.
Reference
According to a classification scheme, the estimated Koc value suggests that test chemical is expected to have very low mobility in soil.
Description of key information
Adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical (from handbook, 2008 and secondary source, 2011). The adsorption coefficient (Koc) value of test chemical was estimated to be 1995262.3 dimensionless (Log Koc = 6.3) at 25°C. This Koc value indicates that the test chemical hasa very strong sorption tosoil and sediment and therefore have negligible migration potential to ground water.
Key value for chemical safety assessment
- Koc at 20 °C:
- 1 995 262.3
Additional information
Various predicted data of the test chemical were reviewed for the adsorption end point which are summarized as below:
Adsorption study was conducted for estimating the adsorption coefficient (Koc) value of test chemical (from handbook, 2008 and secondary source, 2011). The adsorption coefficient (Koc) value of test chemical was estimated to be 1995262.3 dimensionless (Log Koc = 6.3) at 25°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.
In aprediction done using theKOCWIN Programof Estimation Programs Interface (2018) 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 338300 L/kg (log Koc= 5.529) 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 4999, 36135, 190677, 340864, 370104, 373307, 373630, 373663 and 373666 at pH range 0, 1, 2, 3, 4, 5, 6, 7 and 8-14, respectively (logKoc value ranges from 3.7 ± 1.0 to 5.6 ± 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.
On the basis of above overall results for test chemical, it can be concluded that the log Koc value (at pH 7.0) of test chemical was estimated to be ranges from 5.529 to 6.3, respectively, indicating that the test chemicalhas a very strong sorption to soil and sediment and therefore have negligible migration potential to ground water.
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