Dimethylcyclohex-3-ene-1-carbaldehyde

Short-term toxicity to aquatic invertebrates

Description of key information

For Vertoliff a 48-hour acute Daphnia test was performed. Method: The study was carried out using closed systems with semi-static exposure according to OECD TG 202 and encompasses 6 treatment groups including a control. The test concentrations were made using a supersaturated stock solution of 100 mg/L and its dilutions of 1:2.2, 1:4.84, 1:10.6 and 1:23.4 and a control. The mean measured concentrations of the test item were 94.4, 38.4, 18.2, 7.96 and 3.41 mg test item/L and a control. Results: The analysis showed that after 24 and 48 hours the test concentrations were 85% of the nominal values. All reported results refer to mean measured concentrations since the concentrations of the test item were within ± 20 % of the measured initial concentrations during the test. After 48 hours of exposure no immobilisation of the test animals was observed in the control and up to and including the test item concentration of 18.2 mg test item/L. At concentrations of 38.4 and 94.4 mg test item/L, all daphnids were immobile at test end. Additionally, sublethal effects like slow movement were observed at a test concentration of 18.2 mg test item/L. The EC50 24h and 48h were both 26.4 mg/l.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates

Dose descriptor:

EC50

Effect concentration:

24.6 mg/L