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Short-term toxicity to aquatic invertebrates

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Description of key information

Short-term toxicity to aquatic invertebrates: 48-h EC50 24 mg/l and NOEC 9.3 mg/l (measured, geometric mean concentration), OECD 202

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
24 mg/L

Additional information

A 48 hour EC50 value of 24 mg/l and NOEC value of 9.3 mg/l, based on measured geometric mean concentrations, have been reported for the effects of α-methylenebenzyl acetate on mobility of Daphnia magna.

During validation of the analytical method the test item was stable under the test conditions without test organism.

Considerable loss of test material was experienced during the test with the Daphnia present.

At the beginning and at the end of the test, the content of the test item in the test solutions was determined using gas chromatography. The measured concentrations were in the range 97 - 100 % of the nominal concentration at the start of the test. At the end of the test the measured concentrations were only in the range 0 - 14 % of the nominal concentrations.

Therefore determination of the biological results was based on the geometric mean of the measured concentrations.