Registration Dossier
Registration Dossier
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EC number: 266-007-8 | CAS number: 65996-74-9 The oxidized surface of steel produced during reheating, conditioning, hot rolling, and hot forming operations. This substance is usually removed by process waters used for descaling, roll and material cooling, and other purposes. It is subsequently recovered by gravity separation techniques. Composed primarily of high-purity iron oxides. May contain varying amounts of other oxides, elements, and trace compounds.
Bioaccumulation: aquatic / sediment
Administrative data
- Endpoint:
- bioaccumulation: aquatic / sediment
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Mill scale is mainly and primarily composed of high-purity iron oxides (on average above 65%, i.e. FeO, Fe2O3, Fe3O4). Besides, other metal oxides and spinels, elements, and trace compounds such as oil residues <1% for all the uses except for batteries and Melting charge for which <3% can be found in the mill scale. More information on the justification of read across can be found in the attached document in the endpoint summaries of section 5 and 6.
Data source
Materials and methods
Test material
- Reference substance name:
- Iron
- EC Number:
- 231-096-4
- EC Name:
- Iron
- Cas Number:
- 7439-89-6
- IUPAC Name:
- iron(2+)
Constituent 1
Results and discussion
Applicant's summary and conclusion
- Conclusions:
- Iron is an essential trace element, well regulated in all living organisms. The available evidence shows the absence of iron biomagnification across the tropic chain both in the aquatic and terrestrial food chains. The existing information suggests not only that iron does not biomagnify, but rather that it tends to exhibit biodilution. Therefore the need for additional testing for bioaccumulation can be waived. More information can be found in the attached position paper ('Position Paper Iron.pdf' and 'White paper on waiving for secondary poisoning for Al & Fe compounds final report 02-02-2010.pdf').
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