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EC number: 500-051-3
CAS number: 26780-96-1
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
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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