Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Data on aquatic effects of TMQ are available on three trophic levels (fish, daphnia and algae) for acute toxicity. The most sensitive acute toxicity was observed for daphnia with 48h-EL50 of 56 mg/l. The only one chronic effect was reported on the algal toxicity of TMQ with a 72h-EL0 of >= 100 mg/l. Meanwhile a 3h-EC50 > 10000 mg/l to activated sludge was also reported as the toxicity of TMQ to microorganism. Due to the heterogeneous composition of the test substance, the effective loading (EL) was determined upon water accommodated fraction (WAF) without chemical analysis.

According to column 2 of REACH Annex IX, further long-term toxicity tests should be proposed by the registrant if the chemical safety assessment indicates the need to further investigate effects on aquatic organisms as indicated by a PEC/PNEC ratio > 1. Having a PEC/PNEC ratio <1 for all exposure scenarios, there is no need to perform a long-term assay as the risk towards aquatic organisms is sufficiently controlled based on the already available information.