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EC number: 203-620-1 | CAS number: 108-83-8
Acute toxicity data were available for fish, Daphnia and algae. Acute endpoints included an LC50 of 30 mg/L for rainbow trout (96- hr), 37.2 mg/L (48 -hr) for Daphnids and 49.7 mg/L (72 -hr growth inhibition) with algae. These values fall between 10 - 100 mg/L which indicates that diisobutyle ketone is only slight toxic to aquatic organisms.
This aliphatic ketone has a low log Kow of 3.71, a predicted BCF value of 130 L/kg and is readily biodegradable. Diisobutyl ketone s is expected to be effectively removed during activated sludge sewage treatment and is not expected to occupy the water, sediment or soil compartments. The risk assessment shows that the PEC/PNEC ratio is clearly <1, indicating no need for further information or testing. According to REACH Annex IX requirements, long-term toxicity testing shall only be considered when the chemical safety assessment indicates the need for further investigation. Therefore, long-term testing in aquatic species (fish and daphnid) can be waived for diisobutyl ketone.
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