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.
Appearance / physical state / colour
Administrative data
- Endpoint:
- appearance / physical state / colour
- Type of information:
- other: observation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data from peer reviewed handbook
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Laminage à froid des produits plats
- Author:
- Jean-Claude Calmon, Jean Cenac
Materials and methods
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Mill scale (ferrous metal)
- EC Number:
- 266-007-8
- EC Name:
- Mill scale (ferrous metal)
- Cas Number:
- 65996-74-9
- Molecular formula:
- Not available (see remarks field below)
- IUPAC Name:
- Mill Scale (ferrous metal)
Constituent 1
Results and discussion
- Physical state at 20°C and 1013 hPa:
- solid
Form / colour / odour
- Form:
- other: granular
- Colour:
- Grey. Colour can vary depending on the prevalence of the iron oxides and further reaction with oxygen: grey-blue, when prevalence of Fe2O3; light grey, when prevalence of Fe3O4; mill scale may even turn to red colour.
- Odour:
- odourless
- Substance type:
- inorganic
Applicant's summary and conclusion
- Executive summary:
Mill scale is a grey, odorless, inorganic, solid substance in granular shape.
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