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EC number: 266-002-0 | CAS number: 65996-69-2 The fused substance formed by the action of a flux upon the gangue of the iron-bearing materials charged to a blast furnace and upon the oxidized impurities in the iron produced. Depending upon the particular blast furnace operation, the slag is composed primarily of sulfur and oxides of aluminum, calcium, magnesium, and silicon.
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Non-guideline study based on scientific principles
Data source
Referenceopen allclose all
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 991
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 992
Materials and methods
- Principles of method if other than guideline:
- 2 different lysimeter experiments and field research
- GLP compliance:
- no
- Type of study / information:
- Compilation of several experiments with laboratory (ordinary laboratory and large scale) lysimeters and road lysimeters.
Test material
- Reference substance name:
- Slags, ferrous metal, blast furnace
- EC Number:
- 266-002-0
- EC Name:
- Slags, ferrous metal, blast furnace
- Cas Number:
- 65996-69-2
- Molecular formula:
- ~ Al(n)Ca(m)Mg(o)Si(p)O(3n/2+m+o+2p)
- IUPAC Name:
- Aluminium-Calcium-Magnesium-Silicium oxide equivalent
- Details on test material:
- Marketed slag used as test material
Constituent 1
Results and discussion
Any other information on results incl. tables
The study was conducted to examine the effects of slag on pH and on the concentrations of ions (Al, Ca, SO4) in different soils and to determine the influence of the study dimensions on the results of leaching experiments. It became obvious that the dimension (small-medium-large size) of experiments is an important factor. In general, small size experiments mirror extreme situations closely related to worst case scenarios. The simulation experiments in the environment reflect the realistic conditions but are very difficult to perform, and they suffer from the limited influence of the experimentator on the experimental conditions.
Analytical information on leachates of ABS, sandy soil and soil containing clay (leaching method DIN 38414 DEV S4)
ABS sandy soil loamy soil
pH (DIN 38404) 10.9 5.2* 7.5*
Al mg/l 0.65 0.45 0.22
Ca mg/l 82 5 13
Cd mg/l < 0.0001 0.0001 0.0001
Cr mg/l < 0.001 0.001 0.001
Cu mg/l < 0.001 0.003 < 0.001
Fe mg/l < 0.01 0.39 0.04
Mg mg/l 0.5 0.3 1.0
Pb mg/l < 0.001 0.002 < 0.001
Zn mg/l < 0.01 0.08 0.17
SO42¯ mg/l 16.0 4.0 3.0
pH determined according to DIN 38404
* determination in CaCl2 solution as a suspension There was no relevant difference between leachtes of ABS and soilsApplicant's summary and conclusion
- Conclusions:
- Small and large scale lysimeter studies in the laboratory and large scale road lysimeter experiments suggest that slags can be used in road construction as an environmentally friendly material.
- Executive summary:
Small and large scale lysimeter studies in the laboratory and large scale road lysimeter experiments suggest that slags can be used in road construction as an environmentally friendly material. Soil conditions influence the applicability of slags as road construction material. In general, a clay layer under the slag will be an effective buffer to diminish leaching of Al-, Ca-, and SO4-ions.
Leakage depends on the sum of water/rain draining the street. The smaller the amount of precipitation, the lesser the leaching.
Scale of experiments influences outcome of leaching experiments. Large-scale simulation studies better reflect environmental conditions than small-scale laboratory leaching. Environmental effects of slag in the environment are certainly less than these predicted from small-scale laboratory leaching experiments.
The authors suggest that lysimeter studies shall be chosen in large scale to give a more realistic insight in the environmental behavior of slags (FEhS (Bialucha, Geiseler and Degro) 1991, 1992).
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.
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