Registration Dossier
Registration Dossier
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EC number: 914-129-3 | CAS number: 12336-95-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no hazard identified
Marine water
- Hazard assessment conclusion:
- no hazard identified
STP
- Hazard assessment conclusion:
- no hazard identified
Sediment (freshwater)
- Hazard assessment conclusion:
- no hazard identified
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no hazard identified
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
.
Conclusion on classification
Data on the registered substance itself is available for all three trophic levels. No hazard has been identified for the aquatic compartment based on reliable guideline studies with the test item.
When the test substance is added to water, a pH in the range of < 2 is established at which the substance is readily soluble in water.
At a neutral or slightly acidic range as provided for water hazard testing (and buffered), the substance hydrolyses faster than it can cause harm. The result of this hydrolysis is chromium(III) oxide that is virtual insoluble as stated in the disseminated REACH registration dossier at ECHA's website. Thepoorly soluble substance chromium(III) oxide is thus evaluated by comparing the dissolved chromium(III) ion level resulting from the T/Dp at a loading rate of 1 mg/L after 7 and 28 d with the lowest acute or chronic effect concentration, respectively, as determined for the (soluble) chromium(III) ion.The lowest reliable acute and chronic effect concentrations determined for the (soluble) chromium(III) ion are a 72 h ErC50 > 148.1 µg Cr(III)/L and a 72 h ErC10 of 2.0 µg Cr(III)/L observed in a growth inhibition test for the effects of chromium (III) hydroxide sulphate on freshwater algaeDesmodesmus subspicatus(Neuhahn, 2010). Dissolved chromium concentrations of <0.01 µg/L in the T/Dp after 7 and 28 days at pH 6 (i.e. the pH that maximizes the dissolution) are significantly lower than the lowest reliable acute effect concentration derived for algae (i.e. EC50 > 0.148.1 mg Cr(III)/L) and the lowest reliable chronic effect concentration derived for algae (i.e. ErC10 of 2.0 µg Cr(III)/L). Hence, chromium(III) oxide is not sufficiently soluble in environmental media to cause acute or chronic toxicity to algae at the level of the lowest acute and chronic effect concentration (expressed as the EC50/EC10, respectively). In addition chromium(III) compounds arelargely bound to suspended matter and thus minimise the bioavailability.
Thus, the substance does not require classification for acute aquatic toxicity and chronic aquatic toxicity according to Regulation (EC) No 1272/2008
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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