Registration Dossier
Registration Dossier
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EC number: 800-426-4 | CAS number: 1373883-45-4
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
WATER: Not relevant sinve the substance is highly insoluble in water.
SEDIMENT: Not relevant as target compartment.
Key value for chemical safety assessment
Additional information
WATER
According to the Regulation (EC) No 1907/2006 (REACH) Annex IX 9.2.1.2. Column 2 simulation testing in surface water is not required if the test substance is highly insoluble in water. As the water solubility of the Fatty acids, C18 unsaturated, trimers, hydrogenated is < 0.001 mg/L, a study does not need to be conducted for this particular endpoint.
SEDIMENT
Fatty acids, C18 unsaturated, trimers, hydrogenated is poorly soluble in water (0.001 mg/L) and has high adsorption potential (log Koc 14.2, KOCWIN v2.00, MCI). The Guidance on information requirements and chemical safety assessment, Chapter R7.b states that insoluble chemicals will be removed in the primary settling tank or fat trap and thus will not reach the activated sludge (ECHA, 2012). If small amounts were to stay in the water, they would be removed from the water column by adsorption to the activated sludge. Quantities of this substance in the effluent discharged into surface waters are therefore expected to be negligible, and consequently, a significant exposure of sediment is unlikely. According to the Regulation (EC) No 1907/2006 (REACH) Annex IX 9.2.1.4 Column 2 a sediment simulation test does not have to be conducted if direct or indirect exposure to sediment is unlikely. Furthermore, according to the Guidance on information requirements and chemical safety assessment, Chapter R.7b, a simulation test will normally not be required for all environmental compartments. Only the compartments of highest exposure and risk should be tested first. As discussed above, sediment is not assumed to be the highest exposure and risk compartment for Fatty acids, C18 unsaturated, trimers, hydrogenated, and therefore, no simulation test in sediment is proposed.
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