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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The nominal concentrations of the test item of 1.0, 3.2, 10, 32 and 100 mg/L were tested in parallel with a control. The measured concentrations of Manganese oxalate dihydrate (based on manganese) in the test media of the test concentrations of 3.2 to 100 mg/L were between 97 and 110% of the nominal values at the start of the test and between 94 and 102% at the end of the test. Thus, the correct dosing of the test item Manganese oxalate dihydrate was confirmed. 

The biological test results related to Manganese oxalate (correction factor: 1.252 and based on mean measured concentrations) were as follows:
EC50 72h (growth rate): 68.7 mg/L

Key value for chemical safety assessment

EC50 for freshwater algae:
68 mg/L

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