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Short-term toxicity to aquatic invertebrates

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Description of key information

Short-term toxicity to aquatic invertebrates: EC50 (48h) >100 mg/L for Daphnia magna (OECD TG 202, static, Klimisch reliability 1)

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
100 mg/L

Additional information

One reliable study (Priestly, 2010 from Harlan Laboratories) was available which was given a Klimisch 1 score. The study was performed according to OECD TG 202 and EC Method C.2, and according to GLP principles. In the study, Daphnia magna were exposed to aqueous solutions of phosphoric acid under static test conditions. The pH was adjusted to 7 (pH from 7 to 7.8).

The concentrations that were tested were 10, 18, 32, 56 and 100 mg/L. The 48h-EC50 was >100 mg/L and the NOEC = 56 mg/L, based on nominal concentrations. Measured test concentrations ranged from 82% to 94% of nominal at the start of the test, and from 80 % to 92% after 48h.