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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Link to relevant study record(s)

Description of key information

chronic NOEC for one multicellular algae species available (0.06mg Zn/l). 
Additional supportive information on 4 higher aquatic plant species available; chronic NOEC >650µg Zn/l on all 4 species tested.

Key value for chemical safety assessment

Additional information

The following robust study summary is based on the data presented in the environmental sections of this dossier and adresses solely zinc, zinc oxide and zinc chloride. The environmental hazards of zinc hexafluorosilicate originate exclusively from the zinc ion. Refer to read-across justification for details.

The EU risk assessment on zinc (ECB 2008) used one chronic NOEC on Cladophora glomerata in the PNEC database. Additional information on long term experiments on 4 higher aquatic plant species was used as supportive evidence, demonstrating the low sensitivity of this taxonomic group.