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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Mill scale is a UVCB and particle size characteristics depend on the process in which mill scale is generated. For a typical sample of mill scale the particle size distribution determined by sieving. Mill scale is not a fine powder, but usually consists of granular or flaky particles, typically in the range 0.2 - 4 mm.
Additional information
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