Registration Dossier
Registration Dossier
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EC number: 208-857-4 | CAS number: 544-01-4
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
Diisopentyl ether is hydrolytically stable (LAUS GmbH, 2011). Studies on direct phototransformation in water are not available but is is assumed that the substance is not degraded by direct photolysis due to its chemical structure. It is concluded, therefore, that abiotic processes do not contribute significantly to the depletion of the substance in the aquatic environment.
Biodegradation
Diisopentyl ether is not readily biodegradable under aerobic conditions (NITE, 1983). No simulation tests are available. A conclusion whether diisopentyl ether is degraded in natural water systems is not possible based on the available data.
Bioaccumulation
BCF values in the range of 84 to 313 L/kg were measured for diisopentyl ether. The substance does not fulfil the bioaccumulation trigger value of BCF > 2000 L/kg as given in ECHA Guidance, Chapter R.11, and does not fulfil the B- or vB-criterion.
Transport and distribution
In an OECD 121 test the mean measured Koc for diisopentyl ether in soil was 794 L/kg (log Koc = 2.9). Based on the adsorption coefficient Koc of 794 diisopentyl ether belongs to a low mobility class in soil and sediment according to the criteria set up by McCall et al. (1981).
McCall P.J., Laskowski D.A., Swann R.L., and Dishburger H.J., (1981), “Measurement of sorption coefficients of organic chemicals and their use, in environmental fate analysis”, in Test Protocols for Environmental Fate and Movement of Toxicants. Proceedings of AOAC Symposium, AOAC, Washington DC.
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