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The adsorption coefficient (Koc) was determined for FAT 41'030, a structural analogue of FAT 41045, according to the OECD Guideline for the Testing of Chemicals, No. 121, Estimation of the Adsorption Coefficient (Koc) on Soil and Sewage Sludge using High Performance Liquid Chromatography (HPLC), January, 2001. Both substances are very similar in their chemical structure and, as demonstrated, in a number of physicochemical properties. Therefore, the use of this study for read-across is considered to be appropriate.


This study produced log Koc values of 6.3 (first peak), 6.6 (second peak) and 7.0 (third peak) for FAT 41'030/A. The Koc of FAT 41'030/A was calculated to be 1995262 (first peak), 3981072 (second peak) and 10000000 (third peak). Thus both, FAT 41030 and FAT 41045 are immobile.