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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

Key data (lowest EC50 values) are: 
- for Daphnia pulicatia : 1.16 mg NH3 /l (single value)
- for Daphina magna: 1.61 mg / NH3 / l (geometric mean)
-for Ceriodapnia dubia: 0.413 mg Zn/l (single value) at low pH and low hardness
-for Ceriodapnia dubia: >0.53 mg Zn/l (single value) at low pH and high hardness
-for Ceriodapnia dubia: 0.147 mg Zn/l (geomean value) at neutral/high pH and low hardness
-for Ceriodapnia dubia: 0.228 mg Zn/l (geomean value) at neutral/high pH and high hardness
So in conclusion zinc is responsible for acute toxicity in invertebrates

Key value for chemical safety assessment

Additional information

Many good quality and relevant data for 5 standard species. Tests were done according to standard protocol or equivalent.

Data are grouped per species according to

-pH: low (6 -<7) - neutral/high (7 -8.5)

-and hardness: low/medium (<100mg CaCO3/l) and medium/high (>100 mg CaCO3/l).

Ceriodaphnia dubia is for all test conditions the most sensitive species.