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No experimental data evaluating the biodegradation potential of Glycerides, C12-18 mono- and di- (CAS No. 91052-49-2) are available. Therefore, data from a structurally related analogue substance are used as read-across in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5. In a biodegradation screening study performed with the read-across substance Glycerides, C12-18 di- and tri- (CAS No. 91744-28-4), 79.5% biodegradation after 28 days was observed. Based on this result, Glycerides, C12-18 mono- and di- is expected to be readily biodegradable as well and therefore, rapidly biodegraded in both aquatic and terrestrial environments. Thus, in accordance with Regulation (EC) No. 1907/2006, Annex IX, Column 2,, and, further testing on biodegradation of the substance in water, sediment and soil is not required.