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EC number: 270-877-4
CAS number: 68479-98-1
Classification as "R50 /53 Dangerous for the environment;
Very toxic to aquatic organisms, may cause long-term adverse effects in
the aquatic environment" was formerly agreed upon at the EU level under
the Dangerous Substances Directive. Classification as R50 is based on
ecotoxicologal data from daphnia (EC50=0.5 mg/L). However,
classification of R53 does not apply according to current status of
evaluation. In fact, the substance is not biodegradable, however it does
not fulfill the second criterion logPow>3. The measured logPow is 1.16.
The experimental values for aquatic toxicity along with
the applied assessment factors ensure that the PNECs are very
conservative and protective of organisms in the environment. Using the
acute toxicity value of 0.5 mg/L for Daphnia (BayerAG, 1993) and the
chronic toxicity estimate for algae, the test substance meets the
criteria for Acute Category 1 and Chronic Category 1 hazardous to the
aquatic environment. See:
Regulation (EC) No 1272/2008; See Official Journal of the European
Union, (2008) Vol. L353, pp. 1-1355, at p. 131. However, classification as
chronic cat. 1 should not apply according to existing data. The substance
is, in fact, not readily biodegradable, but it does not fulfill the second
criterion logPow>4 (measured: logPow=1.16).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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