Registration Dossier
Registration Dossier
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EC number: 273-734-4 | CAS number: 69012-34-6 By-product from open-hearth steelmaking. Consists of oxides of calcium, iron, silicon and vanadium.
Endpoint summary
Administrative data
Description of key information
Additional information
Slags, steelmaking, vanadium is a sparingly soluble UVCB substance that upon dissolution may release minor amounts of vanadium and insignificant amounts of other elements. Thus, regarding the environmental fate, vanadium is the moiety of concern. A detailed overview of both background and ambient vanadium concentrations in the environment (air, aquatic, terrestrial and sediment compartment) was made based on monitoring data in order to determine the typical background and reasonable worst case ambient concentration of vanadium in freshwater, sediment, soil and air for the EU-27 and Norway (see attached report for details). Attention has been given on large data sets that originated from National, federal and Academic Environmental Agencies and Institutes, or measurements that were generated in national/international monitoring programs (e.g. EIONET, FOREGS, GEMAS).
The natural background concentration is the natural concentration of an element in the environment that reflects the situation before any human activity disturbed the natural equilibrium (e.g., the situation a few thousands year ago). Because of historical and current anthropogenic input from diffuse sources, the direct measurement of natural background concentrations is not feasible in the European environment. As an alternative, baseline background concentration are measured. This is the concentration of an element in the present or past corresponding to very low anthropogenic pressure (i.e., close to the natural background). Ambient concentrations are defined as the sum of the natural background of an element with diffuse anthropogenic input in the past or present (i.e., influence of point sources not included). Reasonable worst-case (RWC) ambient concentration levels are used for the regional risk assessment (regional PEC).
| Compartment | Unit | Typical median baseline background concentration | Reasonable worst case ambient concentration |
| Fresh surface water | µg V/L | 0.49 | 2.03 |
| Stream sediment | mg V/kg dw | 25.7 | 43.2 |
| Agricultural soil (0 -20 cm) | mg V/kg dw | 29.5 | 42.2 |
| Grazing land (0 -10 cm) | mg V/kg dw | 29.5 | 47.0 |
| Air | ng V/m3 | No data | 4.31 |
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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