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Short-term toxicity to aquatic invertebrates

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For freshwater invertebrates, 44 individual reliable acute toxicity data points for two different species were put forward for hazard assessment purposes. The acute toxicity values (48h-LC50) for Ceriodaphnia dubia varied between 26.4 µg dissolved Pb/L (at pH 8.1 and hardness of 25 mg/L as CaCO3) and 3115.8 µg dissolved Pb/L (at pH 8.15 and hardness of 103.2 mg/L as CaCO3).The acute toxicity values (48h-LC50) for Daphnia magna were situated between 280 µg dissolved Pb/L (at pH 7.5 and hardness of 72 mg/L as CaCO3) and 364.5 µg dissolved Pb/L (at pH 7.6 and hardness of 54 mg/L as CaCO3).

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