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Long-term toxicity to aquatic invertebrates

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long-term toxicity to aquatic invertebrates
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Description of key information

No reliable long-term studies on invertebrates are available.

Key value for chemical safety assessment

Additional information

Both calcium and carbonate ions are extremely common in all natural surface waters and are therefore ubiquitous in the environment. This natural abundance of calcium and carbonate ions in the environment means that aquatic organisms including invertebrates are constantly exposed to calcium carbonate without suffering from any adverse or detrimental effects.

Furthermore, both calcium and carbonate are essential constituents of living organisms, including invertebrates.

In an acute toxicity study to Daphnia magna with a saturated solution (100% v/v) of uncoated nano calcium carbonate no immobilisation or toxic effects were observed in any of the Daphnia magna exposed (Priestly, 2010). As a result, calcium carbonate is considered not acutely toxic to aquatic invertebrates and hence long term testing is considered to be unnecessary.