Registration Dossier
Registration Dossier
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EC number: 266-004-1 | CAS number: 65996-71-6 The fused substance formed by the action of a flux upon the gangue of iron-bearing materials charged to a steelmaking furnace and upon the oxidized impurities in the steel produced. Depending upon the particular steelmaking operation, the slag is composed primarily of sulfur and oxides of aluminum, calcium, iron, magnesium, manganese, phosphorus, and silicon.
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
Melting range is 1100 - 1400 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 400 °C
Additional information
Ferrous slags are formed at temperatures above 1400 °C. As ferrous slags are UVCB composed of several fused silicates of different chain length, they have no well-defined melting point but a melting range. The transition from solid state to the liquid state (melting) occurs at temperatures of 1100 - 1400 °C, being influenced e.g. by the exact composition of the slags.
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