Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Freshwater aquatic toxicity data were available for three tropic levels: fish, invertebrates and algae. No adverse effects were observed in any of the available acute tests with LC50 > 100 (fish), > 1000 and > 1000 mg/L respectively. In a long term reproductive toxicity test with aquatic invertebrates, the NOEL was found to be > 100 mg/L. A long-term study in fish is proposed. MMB is readily biodegradable and has a low log Kow (0.18). Therefore, a long term exposure of aquatic organisms or a bioaccumulation of MMB is not expected. In an activated sludge respiration inhibition test with MMB, the substance had no effects on the activated sludge at a limit test concentration of 1000 mg/L. It is considered that the respiration inhibition of MMB is neglible because an EC50 > 1000 mg/L of the substance was determined in this test.