Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The adsorption desorption test was technically not possible to fulfil. Hence, individual log Koc for respectively neutral and ionic amine constituent was derived using KOWWIN. At pH 7, the proportion of ionic to neutral amine is considered to be 0.99975 to 0.00025. A weight average of log Koc was calculated to 4.61 based on the proportion of the individual constituents and the fraction of ionic and neutral amine.

Preliminary test of the adsoprtion behaviour of the

remaining aqueous concentration after equilibrium was lower than the LOQ (LOD) including using an improved procedure to concentrate the substance using SPE. Testing at concentration ≤ ½ of water solubility i.e. lower than the concentration now tested it would have been even more difficult to measure anything in the aqueous phase.

in two different soils together with optimization of the required analytical method were started in May 2013. These investigations indicated that a definitive study following OECD 106 (2000) and Council Regulation (EC) No. 440/2008, C.18 (2001) is not feasible because no accurate adsorption coefficients KD as well as corresponding organic carbon normalised adsorption coefficients KOC could be derived due to concurrent adsorption processes on test vessel surfaces. Furthermore the required analytical sensitivity could not be obtained with sufficient accuracy providing recoveries between 90 and 110%.

All together, the remaining aqueous concentration after equilibrium in the preliminary test was lower than the LOQ including using an improved procedure to concentrate the substance. Testing at concentration ≤ ½ of water solubility i.e. lower than the concentration now tested it would have been even more difficult to measure anything in the aqueous phase. Hence, an OECD 106 study was not considered as possible to fulfil for Amine, C16 -22 -alkyl.