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Acute studies on aquatic organisms of three different trophic levels are available. The most sensitive organism regarding acute toxicity to aquatic organisms were fish. In a test on Danio rerio a LC50 of 2.04 mg/l was determined. In D. magna an EC of 10.7 mg/l was detected whereas algae were less sensitve. In a test on Scenedesmus subspicatus an EC50 of 29.16 mg/l was detected.

There is one chronic fish toxicity study according to OECD 229 available, which has been requested within the CoRAP process under REACH. The outcome of the Fish Short Term Reproduction Assay revealed no adverse effects on population relevant endpoints up to the highest testing concentration (200 µg/L). Thus, the derived chronic NOEC for fish is >200 µg/L.

For the other trophic levels, no chronic studies are available. However, considering the a/c-ratio, corresponding studies are not considered to have a relevant influence on the risk assessment and thus no further studies are proposed.

For the sediment and terrestric compartments the equilibrium partitioning method has been used.

The PNEC STP was calculated using the EC10 of >100 mg/l determined in a respiration inhibition test conducted with domestic, activated sludge.