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.
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.127 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.61 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 1 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 100 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1 000 mg/kg sediment dw
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 100 mg/kg sediment dw
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 100 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
No ecotoxicological information is available for synthetic rutile. Therefore, read-across is proposed to TiO2 and upgraded ilmenite (UGI).
For synthetic rutile, no Acute 1/Chronic 1, 2, 3 classification category under CLP is warranted as there was no acute toxicity (<50%) observed on invertebrates and fish up to >1,000 mg TiO2/L. Only algae resulted in an EC50 value for growth rate below 100 mg/L (61 mg TiO2/L) for Pseudokirchneriella subcapitata. However, the corresponding chronic EC10 values for the algae P. subcapitata was 12.7 mg TiO2/L, which is above the 1 mg/L threshold for classification based on chronic toxicity. Although no chronic data are available for daphnids and fish, the remaining Chronic 4 classification category under CLP can be removed based on the following arguments:
• No significant acute toxicity was noted for daphnids and fish at a concentration of 100 mg/L that is 100 times higher than the chronic threshold concentration level (1 mg/L). This observation strongly suggests that no chronic effects below 1 mg/L are expected for fish and invertebrates.
• No significant chronic effects are noted for the most sensitive organism, i.e. the alga P. subcapitata, at a concentration of 1 mg/L.
Therefore, there is no need for an environmental classification of synthetic rutile.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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