Registration Dossier
Registration Dossier
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EC number: 308-551-1 | CAS number: 98072-94-7 Natural ilmenite ore is concentrated by selective removal of impurities, chiefly iron, to yield a product enriched in titanium dioxide. The process consists of an optional oxidative roast followed by a reductive roasting stage, an acidic leaching stage and washing and drying the product. Alternatively the process consists of selectively chlorinating the iron oxide present in the reduced ore.
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
No reliable toxicity data to sediment organisms are available for synthetic rutile. A read-across approach with upgraded ilmenites (UGI) and TiO2 is used. Reliable data are available for both freshwater and marine sediments. Results for chronic toxicity of upgraded ilmenite slags (>80% TiO2) to Hyalella azteca in freshwater sediment did not show toxicity up to 10% or 100,000 mg/kg dw (ARCADIS, 2008). TiO2 exhibited no effect up to 14,989 mg/kg dw after 10 days exposure via dried sediment to the marine amphipod Corophium volutator (Hudson, 2007).
Key value for chemical safety assessment
- EC50 or LC50 for freshwater sediment:
- 100 000 mg/kg sediment dw
- EC50 or LC50 for marine water sediment:
- 14 989 mg/kg sediment dw
- EC10, LC10 or NOEC for freshwater sediment:
- 100 000 mg/kg sediment dw
Additional information
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