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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Tert.-Butylperoxy-2-ethylhexanoat was tested for aquatic toxicity in a number of tests including EU method C.1, Acute toxicity to fish, EU method C.2, Acute toxicity to Daphnia and EU method C.3, Acute toxicity to algae. Following results were obtained:

Acute toxicity to fish:

An acute test following EU method C.1 with rainbow trout revealed a 96-h LC50 of 8.66 mg/L (nominal concentration). The 96-h NOEC was 2.10 mg/L (nominal concentration).

Acute toxicity to aquatic invertebrates:

An acute test following EU method C.2 with Daphnia magna revealed a 48-h EC50 of 7.5 mg/L (nominal concentration).

Acute toxicity to algae:

An acute test following EU method C.3 with Pseudokirchneriella subcapitata revealed a 72-h EC50 (growth rate) of 0.4394 mg/L.

The 72-h NOEC (growth rate) was 0.018 mg/L.

Long-term toxicity to daphnia:

A long-term toxicity to daphnia test following OECD Guideline 211 with Daphnia magna revealed a 21-d NOEC value of 0.45 mg/L, LOEC value of 0.87 mg/L and EC50 value of 1.02 mg/L (based on reproduction and measured concentrations).

Toxicity to microorganisms:

Tert.-Butylperoxy-2-ethylhexanoat was assessed in an activated sludge following EU method C.11 with microorganisms. The 30 min EC50 was determined to be 64 mg/L (nominal concentration).

Long-term toxicity testing to fish is waived according to REACH Annex IX Sect. 9.1 Col 2.