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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

No reliable acute toxicity data on aquatic invertebrates are available for synthetic rutile. A read-across approach between synthetic rutile and TiO2 is used. All reliable acute toxicity tests to invertebrates for TiO2 resulted in unbounded L(E)C50 values ranging from >10 to >10,000 mg TiO2/L, as observed for 4 different invertebrate species in both freshwater and salt water. These reliable results cover a range of TiO2 products with varying particle size (from nano-particles to bulk powders). All these results are taken together in a weight of evidence approach, and it is concluded that TiO2 is not toxic to aquatic invertebrates at >1,000 mg TiO2/L and at >10,000 mg TiO2/L in freshwater and marine water, respectively. The values for synthetic rutile in freshwater and marine water are >1,000 mg TiO2/L and >10,000 mg TiO2/L, respectively.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
1 000 mg/L
EC50/LC50 for marine water invertebrates:
10 000 mg/L

Additional information