Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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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
Link to relevant study record(s)
- Endpoint:
- appearance / physical state / colour
- Type of information:
- other: handbook data
- Adequacy of study:
- key study
- Study period:
- not specified
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- Data from peer reviewed handbook
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- not applicable - handbook data
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Key result
- Form:
- solid: granular
- Colour:
- Grey
- Odour:
- odourless
- Substance type:
- inorganic
- Conclusions:
- Mill scale is a grey, odorless, inorganic, solid substance in granular shape.
Reference
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.
Description of key information
Mill scale is a grey, odourless, inorganic, solid substance in granular shape.
Key value for chemical safety assessment
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- solid: granular
- Colour:
- grey
Additional information
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
