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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

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bioaccumulation in aquatic species: fish
Type of information:
experimental study
Adequacy of study:
supporting study
no guideline required
GLP compliance:
not specified
Details on sampling:
not specified
Test organisms (species):
no data
Details on test organisms:
Route of exposure:
other: no data
Justification for method:
other: not specified
Test type:
not specified
Water / sediment media type:
not specified
Total exposure / uptake duration:
> 1 d
Total depuration duration:
> 1 d
Test temperature:
Dissolved oxygen:
Details on test conditions:
Nominal and measured concentrations:
Reference substance (positive control):
not specified
Details on estimation of bioconcentration:
Validity criteria fulfilled:
not applicable
BCF (Marine, Sn2+)= 3000
bioaccumulation in aquatic species: fish
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because direct and indirect exposure of the aquatic compartment to the substance is unlikely

Description of key information

Key value for chemical safety assessment

BCF (aquatic species):
3 000 dimensionless

Additional information

Thompson et al. (concentration factors of chemical elements in edible aquatic organisms) reports an BCF of 3000. In due to the physical-chemical behavior of the Sn(2 +)-ion under the environmental conditions bioaccumulation is negligible (rapidly oxidation to SnO_4). Metal-containing inorganic substances generally have negligible vapour pressure and are not expected to partition to air. Once released to surface waters and moist soils their fate depends on solubility and dissociation in water. Environmental processes (such as oxidation and the presence of acids or bases) may transform insoluble metals to more soluble ionic forms. Microbiological processes may also transform insoluble metals to more soluble forms. Such ionic species may bind to dissolved ligands or sorb to solid particles in aquatic or aqueous media. A significant proportion of dissolved/ sorbed metals will end up in sediments through the settling of suspended particles. The remaining metal ions can then be taken up by aquatic organisms.

When released to dry soil most metals will exhibit limited mobility and remain in the upper layer; some will leach locally into ground water and/ or surface water ecosystems when soaked by rain or melt ice. Environmental processes may also be important in changing solubilities.

Even though many metals show few toxic effects at physiological pHs, transformation may introduce new or magnified effects.

A metal ion is considered infinitely persistent because it cannot degrade further.

The current state of science does not allow for an unambiguous interpretation of various measures of bioaccumulation.