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.
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
Boiling range > 2000 °C
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 2 000 °C
Additional information
As ferrous slags are UVCB composed of several fused silicates, they have no well-defined boiling point but a boiling range. The transition from the liquid state to the gas phase occurs at temperatures of more than 2000 °C (estimated), being influenced by the exact composition of the molten slag. In general, during production and use, the temperatures are several hundred °C below the boiling point and due to the high input of energy required to reach this temperature, no incidental heating to the boiling range is possible.
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