Registration Dossier
Registration Dossier
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EC number: 215-607-8 | CAS number: 1333-82-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.003 mg/L
- Assessment factor:
- 3
- Extrapolation method:
- sensitivity distribution
- PNEC freshwater (intermittent releases):
- 3.4 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.003 mg/L
- Assessment factor:
- 3
- Extrapolation method:
- sensitivity distribution
- PNEC marine water (intermittent releases):
- 3.4 µg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.21 mg/L
- Assessment factor:
- 1
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.15 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.15 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.035 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 17 mg/kg food
- Assessment factor:
- 10
Additional information
Conclusion on classification
Chromium (VI) trioxide is listed in Annex VI to Regulation (EC) No 1272/2008 (CLP Regulation) with Index No. 024-001-00-0 with the following harmonised environmental classification: Aquatic Acute 1, H400 ( Very toxic to aquatic life) and Aquatic Chronic 1, H410 (Very toxic to aquatic life with long lasting effects).
The EC50 to aquatic invertebrates, including D. magna is < 1 mg/L and the lowest NOEC was 0.0047 mg Cr/L for Ceriodaphnia dubia.
The concept of biodegradability is not applicable to inorganic substances such as Cr(VI) trioxide. Transformation from Cr(VI) to Cr(III) may be rapid under acidic environmental conditions, but less so under neutral to basic conditions. Therefore, rapid dissipation or transformation may not always occur.
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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