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Short-term toxicity to aquatic invertebrates

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Description of key information

EC50 48 h >100 mg/L

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
100 mg/L

Additional information

The test was performed on a similar substance 01 (read-across from supporting substance -structural analogue or surrogate).

The study procedures described in this report were based on the ISO 6341: “Water quality , teh EU C.2.and the OECD guideline 202. The batch of the substance tested was a brown powder with unknown purity and completely solublein test medium at the concentrations tested. After a range-finding test, a limit test was performed with daphnids exposed to a solution of 100 mg/L.

The test consisted of two vessels per group containing 10 daphnids per vessel. Samples for analysis of actual exposure concentrations were taken at the start and the end ofthe limit test. Analysis of the samples taken during the limit test showed that measured concentrations werein agreement with nominal (96-97%).

No daphnids became immobile during the 48 hour test period. Hence, the 48h-EC50 forDaphnia magna exposed to the substance was > 100 mg/L, the maximum concentration to be tested.