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Triacetin (CAS 102-76-1) is considered to be readily biodegradable in one confirmatory GLP-Guideline study (Hales, 1993). The substance is thus expected to be rapidly degraded by microorganisms in both the aquatic and terrestrial environments as well and therefore in accordance with Regulation (EC) No 1907/2006, Annex IX, column 2, 9.2.1.2. - 9.2.1.4., further simulation tests for water and sediment or soil biodegradation are not necessary.