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Experimental data on the biodegradability of of Fatty acids, C18-unsatd., dimers, reaction products with fatty acids, C14-18 and C16-18-unsatd. and propylidynemethanol (CAS 162353-70-0) are not available. The assessment of ready biodegradation is based on read across to the analogue substances C18 Fatty acid, dimers, mixed ester with oleic acid and trimethylolpropane (CAS 147256-33-5) and Fatty acids, C16-18 and C18-unsatd., triesters with trimethylolpropane (CAS 68002-78-8). Based on the ready biodegradability of both source substances in water a rapid degradation of the target substance in aquatic and terrestrial environments is expected. Thus, in accordance with Regulation (EC) No. 1907/2006, column 2, -, further simulation tests on biodegradability in water and sediment or soil are not necessary.