Registration Dossier
Registration Dossier
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EC number: 231-104-6 | CAS number: 7439-95-4
Bioaccumulation: terrestrial
Administrative data
- Endpoint:
- bioaccumulation: terrestrial
- Type of information:
- experimental study
- Adequacy of study:
- disregarded due to major methodological deficiencies
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: Data from a monitoring study. No correct analysis for total Mg concentration in soil (extraction with ammonium acetate-EDTA); Mg concentration in worms derived from graphs (average for all species present in a site).
Data source
Reference
- Reference Type:
- publication
- Title:
- Earthworm communities along a gradient of urbanization.
- Author:
- Pizl V., Josens G.
- Year:
- 1 995
- Bibliographic source:
- Environmental Pollution 90:7-14.
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- monitoring study in soils and earthworms from 6 parks along a transect in Brussels. Biota-to-soil -accumulation-factor (BSAF) is calculated as the ratio of the Mg concentration in worms and the Mg concentration in soil.
- GLP compliance:
- no
Test material
- Reference substance name:
- Magnesium
- EC Number:
- 231-104-6
- EC Name:
- Magnesium
- Cas Number:
- 7439-95-4
- Molecular formula:
- Mg
- IUPAC Name:
- magnesium dihydride
- Details on test material:
- Elemental Mg concentration measured, no information on speciation
Constituent 1
Test substrate
- Vehicle:
- no
Test organisms
- Details on test organisms:
- Earthworms collected in six sites along a gradient of urbanization, including Aporrectodea chlorotica, Aporrectodea caliginosa, Aporrectodea icterica, Aporrectodea rosea, Lumbricus castaneus, Lumbricus rubellus and Lumbricus terrestris
Test conditions
- Details on test conditions:
- Sandy loam soils; pH (H2O) 5.9-7.1, TOC 2.32-4.38%.
- Nominal and measured concentrations:
- internal Mg concentrations: 14500-16500 mg Mg/kg dry weight
Results and discussion
Bioconcentration factor
- Type:
- BSAF
- Value:
- 2.6 - 11.3 L/kg
- Basis:
- whole body d.w.
- Calculation basis:
- steady state
- Remarks on result:
- other: based on monitoring data of Mg concentration in worms and soil
Any other information on results incl. tables
Biota-to-soil -accumulation-factor (BSAF) were calculated as the ratio of the Mg concentration in worms (range 14500 -16500 mg Mg/kg dry weight) and the Mg concentration in soils (range 1103 -5640 mg Mg/kg dry weight) . The BASF range values are between 2.6 and 11.3.
Applicant's summary and conclusion
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