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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

Acute studies with two fish species are available.  

Key value for chemical safety assessment

LC50 for freshwater fish:
0.707 mg/L

Additional information

A 96 hour acute study with Oryzias latipes 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 resulting test concentrations that exceeded the water solubility of the substance. The test resulted in a LC50 of 0.707 mg/L and a LC0 of 0.25 mg/L based upon mean measured concentrations. Another 96 hour acute study was conducted with m-DIPB and Pimephales promelas as a limit test using a recirculating column elution apparatus providing a constant saturated solution. No mortality (NOEC) was observed in this test at at the mean measured concentration of 0.91 mg/L. The results of these studies suggest no acute effects to fish at the limit of water solubility.