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EC number: 209-548-7 | CAS number: 585-07-9
Algae is the most sensitive species to the acute toxic effects of the test item with an acute ErC50 of 26 mg/L. Thus, the substance has not to be classified for acute aquatic toxicity according to Directive 67/548/EEC (DSD) and Regulation (EC) No 1272/2008 (CLP/GHS).
Fish was the most insensitive species in the acute toxicity. Chronic data are available for algae (NOErC of 6 mg/l) and daphnia (NOEC of 1.1 mg/l and 2.6 mg/l for the read across to analogue substance n-butyl methacrylate). The read across substance show a higher toxicity to fish, daphnia and algae in the acute tests, therefore the read across is conservative approached. t-Butyl methacrylate is not ready biodegradable, but ready biodegradable under enhanced conditions according to OECD criteria. The acute toxicity data are > 10 ≤ 100 mg/l. Whereas the chronic data of the most sensitive species are > 1mg/l.
Thus, the substance has not to be classified for chronic acute toxicity according to Directive 67/548/EEC (DSD) and Regulation (EC) No 1272/2008 (CLP/GHS).
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