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Ecotoxicological information

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For Lyral experimental acute aquatic toxicity data are available for three trophic levels, including a respiration inhibition study with activated sludge.

A guideline study for short-term toxicity is available for freshwater fish. The critical acute effect concentration for Lyral is a 96-h LC50 value of 11.8 mg/L in fathead minnow (Pimephales promelas); this value will be used in the assessment.

For invertebrates short-term toxicity a guideline study is available for Daphnia magna. The critical effect concentration for Lyral is a 48-h EC50 value of 15 mg/L; this value will be used in the assessment.

A growth inhibition guideline study is available for freshwater algae. The critical effect concentrations for Lyral are a 72-h ErC50 value of 25.4 mg/L and a 72-h NOErC of 5.95 mg/L in Pseudokirchnerialla subcapitata; these values will be used in the assessment.

For the toxicity of microorganisms a toxicity control in a ready biodegradability study with secondary activated sludge is available . The concentration of 2 mg/L Lyral used in the toxicity control of the ready biodegradation test is considered as the NOEC for microorganism toxicity; this value will be used in the assessment.