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Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

No measured data are available for the short-term toxicity to invertebrates of the registration substance. The assessment of effects is based on available data for its constituents. The available evidence suggests that for all constituents of the registration substance the EC50s in invertebrates over 48 h are expected to be greater than the limit of solubility.

Key value for chemical safety assessment

Additional information

A reliable EC50 value of 3.2 mg/l has been determined for the effects of tetradecanol on the immobility of the freshwater invertebrate D. magna. The effects seen need to be treated with caution because the formation of droplets in most of the test concentrations. However in the range of the limit of solubility (1.9 mg/l) only 10% mortalities were observed, therefore the EC50 is >Limit of Solubility.

A 48h EC50 value of 1700 mg/L has been determined for the effects of octadecanol on the mobility of Daphnia magna. The EC50 was obtained at a concentration above the Limit of Solubility (LoS) and should be treated with caution. The water solubility of octadecanol is much less than this value at 0.0011 mg/L at 25oC, therefore the EC50 value is >LoS, i.e. the test substance was not toxic at the LoS.