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Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Toxicity data from standard toxicity tests indicate that micro-and nanosized TiO2 materials are not toxic to soil organisms including microbes, plants and invertebrates up to at least 1000 mg/kg dw soil.

Additional information

Microsized TiO2:

Chronic NOEC values are available for the effect of upgraded ilmenites (UGI, > 80% TiO2) on plants (barley and lettuce), arthropods (Folsomia candida) and soil microorganisms (nitrification). The NOEC values for soil arthropods and soil microorganisms were 1000 mg/kg dw and 10,000 mg/kg dw. An unbounded NOEC of ≥ 100,000 was determined for plants.

Regarding the toxicity of microsized TiO2 particles, chronic data are available on standard tests with annelids and plants with unbounded NOEC values of ≥ 1000 mg/kg dw.

Nanosized TiO2:

For TiO2-NP, chronic data are available from standard tests with annelids, plants and microbes with unbounded NOEC values ranging from ≥ 1000 mg/kg dw to ≥ 100000 mg/kg dw.

Thus, toxicity data from standard toxicity tests indicate that micro-and nanosized TiO2 materials are not toxic to soil organisms including microbes, plants and invertebrates up to at least 1000 mg/kg dw soil.