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According to Annex VIII, column 2, of the REACH Regulation (EC) No. 1907/2006, adsorption/desorption study does not need to be conduted because, based on the physicochemical properties (low LogKow), the substance can be expected to have a low potential for adsorption. The LogKow of the substance is equal to -3.04, which is an indication of low adsorption potential. Moreover, the estmated Koc of the main constituent of the UVCB substance (80 -80 wt%), calculated using KOCWIN (v2.00), was found to be equal to 0.4538 (Kow Method) (LogKoc = -0.343).