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Ecotoxicological information

Toxicity to terrestrial arthropods

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Description of key information

Key value for chemical safety assessment

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There are no data describing the long-term toxicity of the registered substance to terrestrial arthropods. Terrestrial test data have been read-across from the analogue substance, phenyl silsesquioxanes (EC 939-487-8). An earthworm reproduction (OECD 222) and soil microorganism (OECD 216) test have been conducted with phenyl silsesquioxanes. The earthworm is the standard organism for soil macroorganisms and there is no indication that arthropods would be any more susceptible, therefore the data read-across from the earthworm reproduction test and soil microorganism tests with phenyl silsesquioxanes are considered to be suitable to derive hazard and risk assessment under REACH for 1,3,5-trimethyl-1,1,3,5,5-pentaphenyltrisiloxane and the requirement for further tests with terrestrial arthropods is waived.

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