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EC number: 294-409-3
CAS number: 91722-09-7
Substance formed during processing of liquid steel or during production of iron castings. Consists primarily of fused silicates and trace elements as oxides as well as trace of alloying elements.
The available data suggest no acute or chronic, oral or dermal
effects of the ferrous slags. From mutagenicity studies and despite the
widespread use of the ferrous slags, no CMR potential or other health
effect of these slags is identified.
only critical exposure pathway to humans is the inhalation of the dust
of fine-grained ferrous slag. Therefore exposure by inhalation is
considered to be relevant as a threshold mode of action especially for
workers. GGBS is considered to cover the worst-case of ferrous slag,
because it is intentionally ground for the cement industry and thus
contains by far the highest amount of fine and inhalable particles
compared to other types of ferrous slag.
tests have demonstrated the absence of acute toxicity on vertebrates.
For GGBS a
subacute inhalation study (according OECD Guideline 412) was done. Based
on the results of this study, the No Adverse Effect Level (NOAEL) was
determined to be 24 mg/m³ (target concentration) or 24.9 mg/m³ (achieved
dust limit values - eight hours for inhalable dust are 10 mg/m³ in the
European countries which have one and for respirable dust between 3 and
6 mg/m³. Those general dust limits covers all potential effects of inert
dusts. The dust limit values of 10 mg/m³ (inhalable dust) and 3 mg/m³
(respirable dust) will therefore be used as DNEL’s for chronic exposure
for the whole group.
Exposure of the general population to slags is only incidental.
There are several methods applied to decrease the potential exposure of
the general population to ferrous slags e.g.
covering e.g. in road construction by the surface layer of the road
inclusion in matrix e.g. use of slags in asphalt or concrete
reduction of dusting behaviour by e.g. wetting or pelettization
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.
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