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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

waived

Key value for chemical safety assessment

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The comparison of all acute aquatic toxicity values available for THPC and its read-across substance THPS demonstrate, that the algae is the far more sensitive aquatic species.

Additionally has to be considered that the degradation metabolite THPO by several orders of magnitude is less toxic.

The read-across with THPS is considered to be allowed for THPC because the toxicity is triggered by the organic phosphonium cation which is the same for both substances. The influence of the anions (chloride and sulfate) regarding the toxicological behaviour is considered not to be relevant.

Physico chemical parameter (high water solubility, negative logPow) which influence the toxicological and environmental behavior are comparable in case of THPC and THPS.