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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Short-term toxicity to fish

Reliable results are available from a study conducted according to OECD guideline.

The acute toxicity of Trigonox K-95 to rainbow trout was investigated in a study conducted according to OECD Guideline 203 (Fish, Acute Toxicity Test) under semi-static conditions for 96 h. The concentration of acetone used to dissolve the test chemical was 0.1 mL/L. Analytical monitoring of test substance concentration was not performed. The 96 h NOEC, LC50 and LC100 were determined to be 1.5, 3.9, and 6 mg/L nominal. These findings are supported by the results obtained in a study conducted according to Mann (1975, 1976) and Deutsches Einheitsverfahren zur Wasser-, Abwasser- und Schlamm-Untersuchung L 15: Fischtest (Leuciscus idus melanotus.48 h LC50=14 mg/L nominal).

Short-term toxicity to aquatic invertebrates

Reliable results from studies conducted according to guideline and or conducted according or similar to a national standard method are available.

The acute toxicity of cumene hydroperoxide to Daphnia magna was investigated in a study conducted according to OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test) and EU Method C.2 under GLP conditions. The stability of the test substance was investigated via HPLC/UV-VIS. The 48 h NOEC, LOEC, and EC50 were determined to be 9.15, 18.23, and 18.84 mg/L based on geometric mean measured concentrations.

In two studies conducted according or similar to the German DIN 38412, Part 11 (draft), 24 h EC50 values in the range between 6 and 7 mg/L nominal were determined.

Toxicity to aquatic algae

In a reliable study (Klimisch 1), the 72h EC50 (growth rate) of cumyl hydroperoxide to Scenedesmus subspicatus was 3,1mg/L. The NOEC was 1,0 mgll for growth rate.

Toxicity to microorganisms

Pseudomonas putida was exposed for 16 h to cumene hydroperoxide under static conditions. In the cell multiplication inhibition test, a TT (EC3)>50 mg/L nominal was obtained. In a cell multiplication inhibition test using Entosiphon sulcatum Stein, Chilomonas paramaecium, and Uronema parduczi as test organisms, a 72 h-TT (EC5)=8.5 mg/L (Entosiphon s.), a 48 h TT (EC5)=0.91 mg/L (Chilomonas p.), and a 20 h TT (EC5)=0.35 mg/L (Uronema p.; nominal Each) were determined.