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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The 96-hour LC50 of DBE to fish was estimated to be greater than 18 ppm (v/v) but less than 24 ppm (v/v) in laboratory supply water.

Key value for chemical safety assessment

Additional information

One reliable key study is available for this endpoint. In this study (Phillips FX, 1982), fathead minnows (Pimephales promelas) were exposed to Dibasic esters (DBE) with the test medium. No mass based concentrations or density is given in the study report. No GLP statement is made. The protocol applied is comparable to and fulfils the criteria of EPA OTS 797.1400 (Fish Acute Toxicity Test) for a valid result. The study is conclusive since the density of the test item is considered not different from standard material.

The test animals were exposed to nominal concentration of 0, 10, 13, 18, 24, 32, 42, 56, 75, and 100 ppm (v/v). No analytical measurements of the tested concentrations was performed but due to the high solubility of the substance it is expected to be stable during the test.

No mortality was observed in the control. The temperature, pH and the oxygen in the medium were maintained in the range recommended by the guidance document. DBE exhibited moderate acute toxicity to fathead minnows under static, unaerated test conditions during a 96-hour exposure. The 96-hour LC50ranges between the NOEC of 18 ppm (v/v) and the LOEC of 24 ppm (v/v), where 70% mortality was observed.