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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

Data for the most sensitive long term toxicity tests for 6 species of different groups of freshwater invertebrates are summarised in the EU-RAR (2008). According to these data, the effect concentrations for Trinickel dicitate were calculated:
Cladocerans (Ceriodaphnia dubia): NOEC (7d, reproduction) = 0.010 mg Trinickel dicitrate/L
Amphipods (Hyalella azteca): NOEC (7-8d, mortality) = 0.091 mg Trinickel dicitrate/L
Insects (Clistorina magnifica): NOEC (8 months, survival) = 0.208 mg Trinickel dicitrate/L
Hydrozoans (Hydra littoralis): NOEC (12d, growth rate) = 0.189 mg Trinickel dicitrate/L
Rotifers (Brachionus calyciflorus): EC10 (2d, growth rate) = 0.327 mg Trinickel dicitrate/L
Molluscs (Lymnea stagnalis): EC10 (30d, growth) = 0.005 mg Trinickel dicitrate/L
Data for the most sensitive long term toxicity tests for 5 species of different groups of marine invertebrates, given in the RAR (2008):
Echinoderms (Paracentrotus lividus): EC10 (72h, development) = 0.280 mg Trinickel dicitrate/L
Crustaeceans (Mysidopsis intii): EC10 (28d, growth) = 0.143 mg Trinickel dicitrate/L
Molluscs (Haliotis rufescens): EC10 (22d, metamorphosis) = 0.114 mg Trinickel dicitrate/L
Polychaeta (Neanthes arenaceodentata): EC10 (90d, reproduction) = 0.071 mg Trinickel dicitrate/L

Key value for chemical safety assessment

Additional information

From the database, given in the EU-RAR (2008), 113 individual NOEC/L(E)C10 values’s for 15 different individual freshwater species were selected. Chronic data on invertebrates belonging to different taxonomic groups being cladoceran (79% of the data points), amphipods (0.9% of the data), insects (7% of the data), hydrozoans (0.9% of the data), rotifers (5% of the data) and a mollusc (7% of the data) were summarised in the database. The percentages of the invertebrate species (calculated as the proportion of each group compared to the entire database) represented in the database used to calculate the SSD curve were for cladoceran (23.3%), amphipods (3.3%), insects (6.7%), hydrozoans (3.3%) and for molluscs (6.6%). The NOEC/L(E)C10 varied between 2.8 μg Ni/L (0.0009 mg Trinickel dicitrate/L) for Ceriodaphnia dubia and 1193.3 μg Ni/L (3.755 mg Trinickel dicitrate/L) for Chironomus tentans. The test report of the lowest value for Ceriodaphnia dubia is not public available, so another report for Ceriodaphnia dubia with a somewhat higher NOEC (0.010 mg Trinickel dicitrate/L) was shown in detail in the key study record of chapter 6.1.4. Further results for the other freshwater invertebrates are only shown in the attached document of this key study record.

It is noted that the invertebrate data are heavily dominated by data on cladocerans.

Accepted data on chronic single-species toxicity tests resulting in accepted high quality reliable NOEC or L(E)C10 values (expressed as total Ni concentration) for marine invertebrates are summarized in the EU-RAR 2008. From the database, EC10 values are reported for 10 species out of 5 different groups, ranging from 2.9 μg Ni/L (0.009 mg Trinickel dicitrate/L) for development of the echinoderm, Diadema antillarum, to 335 μg Ni/L (1.055 mg Trinickel dicitrate/L) for development of the echinoderm, Strongylocentrotus purpuratus. In the SSD approach, the data for Diadema antellarum were excluded because of a general disease since the mid 1980s. All data for marine organisms are only shown in the attachment of the above mentioned key study record in chapter 6.1.4.