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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

From the read across with 1,3 (or 1,4)-bis[1-(tert-butylperoxy)-1-methylethyl]benzene: the test substance was not found to be acutely toxic to Pseudokirchneriella subcapitata at a nominal loading rate of 1.0 mg/L, equivalent to an initial mean measured concentration of 0.0471 mg/L.

Key value for chemical safety assessment

Additional information

There is no data on 1,4-bis[1-(tert-butylperoxy)-1-methylethyl]benzene. A read across approach is proposed with 1,3 (or 1,4)-bis[1-(tert-butylperoxy)-1-methylethyl]benzene.

The acute toxicity of [1,3(or 1,4)-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide was evaluated withPseudokirschneriella subcapitatain a study performed in accordance with OECD testing guideline 201 and GLP requirements.

The algae were exposed to nominal test concentrations of 1 mg/L under static conditions during 72 hours. The mean measured concentrations were not maintained between 80 and 120 % of nominal.

pH range and dissolved oxygen concentration were reported and in agreement with the guideline recommendations. Quality criteria were fulfilled.

The test substance was not found to be acutely toxic toPseudokirchneriella subcapitataat a nominal loading rate of 1.0 mg/L, equivalent to an initial mean measured concentration of 0.0471 mg/L.