Registration Dossier
Registration Dossier
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EC number: 270-659-9 | CAS number: 68475-76-3 A complex combination of finely divided inorganic particles separated from the exit gases formed during the manufacture of Portland cement. The flue dust consists of uncalcined raw materials along with partially calcined materials. Some Portland cement clinker is usually included. The major constituents of kiln dust are calcium carbonate, clays, shales, quartz and sulfate salts. The following materials may also be present:@Dolomite@Ca(OH)2@Feldspars@CaSO4@Fly ash@KCl@Iron oxides@K2CO3@CaF2@K2SO4@CaO@Na2SO4@Glasses of SiO2, Al.s@Portland cement chemicals [659
Endpoint summary
Administrative data
Description of key information
Key value for chemical safety assessment
Skin sensitisation
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (sensitising)
- Additional information:
The assumption that Flue dust may have a skin sensitising potential, is based on the experience from the use of Portland cement. It is general knowledge that water soluble chromium (VI) is a sensitizer and that water soluble chromium(VI) occurs in Portland cement clinker, the main constituent of Portland cement, as an impurity. The trace content of chromium is due to the ubiquitous presence in naturally occuring minerals, the raw materials of the cement clinker production.
Thus, cement clinker phases are constituents in Flue Dust, even Flue Dust may have a water soluble chromium(VI) content which could be higher than 2 ppm.
Migrated from Short description of key information:
Flue Dust may have a skin sensitising potential, if it contains water soluble chromium(VI) higher than 2 ppm.
Respiratory sensitisation
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not sensitising)
- Additional information:
There is no human evidence that Flue Dust has a respiratory sensitisation potential.
Justification for classification or non-classification
Because, Flue Dust may act as a skin sensitiser due to the presence of water-soluble chromium(VI), the classification of Flue Dust is:
- Skin sensitisation 1, H317 -May cause an allergic skin reaction (GHS)
- Irritant Xi, R43 -Skin sensitisation (DSD-DPD)
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