Registration Dossier

Environmental fate & pathways

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Description of key information

Adsorption / desorption

The Soil Adsorption Coefficient (Koc) of the test material, estimated using the software KOCWINv2.00, leads to the following results:

Log Koc= 7.93(from MCI)

Log Koc= 5.94 (from Log Kow)

Overall, the MCI methodology is somewhat more accurate than the Log Kow methodology, although both methods yield good results, then the Koc estimate value from MCI was selected for the environmental assessment.

According to the McCall classification scheme, this means that the above substance is immobile (Koc > 5000) on soil.

Henry's Law constant

The Henry's Law constant was estimated using the software HENRYWIN (v3.20). The value of 0.026 Pa m³/mol indicates that the substance is essentially non volatile from surface water.

Distribution modelling

Distribution in environmental compartments has been calculated using a Fugacity model, under the emission scenario of 1000 kg/h into each of air, water and soil compartments, according to Mackay, Level III. Distribution in various environmental compartments is estimated as: Air= 0.62%; Water= 7.76%; Soil= 38.5% and Sediment= 53.1%.

Sediment and soil were then found to be the major target compartments.

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