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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

NOEC = 20 mg/L

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
20 mg/L

Additional information

No data are available on the registered substance itself. However, data are available on three structural analogues of the substance, which after considering the differences in molecular weight, lead to comparable NOEC values. The best quality data originates from a recent study with methyl-tetrahydrophthalic anhydride (MTHPA). The NOEC from this study was 20 mg/L which, when corrected for differences in molecular weight, results in a calculated NOEC of 20 mg/L for 4 -MHHPA.