Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Acute tests on all three trophic levels were performed to examine the acute aquatic toxicity of LAS-TEA. Additionally, a chronic test on aquatic invertebrates and algae is available.

Brachydanio rerio turned out to be the most sensitive species in the acute toxicity tests with a 96-h LC50 of 5.7 mg/L. Daphnia magna was the most sensitive species in the long-term toxicity tests with a reproduction 21-d NOEC of 2.8 mg/L.

Depending on the outcome of the chemical safety asssessment long-term testing on fish may need to be proposed, but sufficient data are available for LAS-Na and TEA, which should provide adequate toxicity data for the long-term toxicity to fish (see read-across statement).

On the basis of the available tests LAS-TEA does not need to be classified as acutely harmful for aquatic organisms.

The toxicity of LAS-TEA to aquatic organisms may be described by the toxicity of LAS-Na and TEA according to the read-across statement in which full dissociation of the LAS-TEA in water is supported.

For LAS-Na a large number of aquatic toxicity studies are available. The EC50s and NOECs are in the same order of magnitude as those found for LAS-TEA but slightly lower. The EC50s and NOECs found in toxicity tests with TEA are higher. Therefore, a precautionary approach is taken for the derivation of the PNECaqua. The large body of long-term ecotoxicity data for LAS-Na results in a conservative estimate of the PNECaqua for the read-across analogue LAS-TEA.