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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

Two acute studies have been conducted on diisopropylbenzene.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
0.392 mg/L

Additional information

A 48 hour acute study with Daphnia magna was conducted with the mixed isomers (meta and para) of diisopropylbenze (DIPB) under semi-static conditions. The test solutions were prepared using a solvent carrier with nominal concentrations ranging from 0.2 to 2.0 mg/l which all exceeded the water solubility of the substance. The test resulted in a EC50 of 0.392 mg/L and a LC0 of 0.246 mg/L based upon mean measured concentrations. Another 48 hour Daphnia magna acute study was conducted with m-DIPB as part of a 7 species study. The study was conducted as a limit test using a recirculating column elution apparatus providing a constant saturated solution. No immobility to Daphnia magna (NOEC) was observed in this test at at the mean measured concentration of 0.93 mg/L. Five other invertebrate species were also included in the 7 species studies and exposed for 96 hours. The LC50s for those 5 other invertbrate species were > 0.91 mg/L, the mean measured concentration of the saturated solution over 96 -hours. The results of these studies suggest no acute effects to invertebrate organisms at the limit of water solubility.