Registration Dossier
Registration Dossier
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EC number: 215-168-2 | CAS number: 1309-37-1
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
Available data for fish, invertebrates and algae indicate a low potential for acute and chronic aquatic toxicity of diiron trioxde in powder and nano-form. Regarding differences in the particle size, the available data for the acute toxicity of diiron trioxide in powder and nano-form to fish further indicate that the particle size does not affect the toxicity potential to any detectable extent since effect concentrations of the powder and nano-form are more than 500-fold above the OECD test limit.
Furthermore, available aquatic toxicity data of iron oxides at large indicate a low potential for aquatic toxicity since acute and chronic effect concentrations avaialble for three trophic levels are above respective OECD test limits and thus above acute and long-term classification criteria.
Soluble iron salts are not considered toxic to the aquatic life, i.e. do not meet CLP classification criteria for Acute (short-term) aquatic hazard and Long-term aquatic hazard. The acute and chronic ecotoxicity reference values (ERVs) for iron ions are above the respective CLP classification criteria of 1 mg/L. “Where the acute ERV for the metal ions of concern is greater than 1 mg/l the metals need not be considered further in the classification scheme for acute hazard (ECHA, 2017, Section IV.5.2.1 Classification strategy for determining acute aquatic hazard for metals, Guidance on the application of CLP criteria V. 5.0)”. In accordance with Figure IV.4 “Classification strategy for determining acute aquatic hazard for metal compounds” of ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance diiron trioxide in powder- and nano-form is poorly soluble and does not meet classification criteria for acute (short-term) aquatic hazard.
"Where the chronic ERV for the metal ions of concern is greater than 1 mg/l, the metals need not be considered further in the classification scheme(ECHA, 2017, Section IV.5.2.2.1 Approach based on available chronic toxicity reference data, Guidance on the application of CLP criteria V. 5.0).” In accordance with Figure IV.5 „Classification strategy for determining long-term aquatic hazard for metal compounds “of ECHA Guidance on the Application of the CLP Criteria (V. 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance diiron trioxide in powder- and nano-form is poorly soluble and does not meet classification criteria for chronic (long-term) aquatic hazard.
The conclusion on a lack of an aquatic hazard potential of diiron trioxide is in accordance with a Tier-1 assessment performed with MECLAS version 5.2 (http://www.meclas.eu/ accessed on 06.02.2020). The Metals Classification Tool (MECLAS) is a web enabled classification tool always updated to the latest classification guidance, legal ruling, information on toxicity references and available self-classifications.
In sum, it can safely be assumed that diiron trioxide in powder- and nano-form does not need meet classification criteria of an acute or long-term aquatic hazard of Regulation (EC) No 1272/2008.
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