Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Marine water

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

STP

Hazard assessment conclusion:
no emission to STP expected

Sediment (freshwater)

Hazard assessment conclusion:
no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:
no exposure of sediment expected

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no exposure of soil expected

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The limited environmental data for FeSi means that calculating a PNEC is slightly problematic. However, the data obtained from the T/D tests should be used as a weight of evidence approach for hazard assessment purposes. These data indicated that FeSi appeared not to contain elements which may cause effects to aquatic organisms. Furthermore, the Daphnia magna reproduction study performed by Lillicrap (2011) indicated that there were no effects of FeSi high Ba which was chosen to be tested as a “worst case” grade of ferrosilicon and has been used for derivation of the PNEC. However, due to the lack of data, an assessment factor of 100 would result in an unrealistic PNEC value (below natural background concentration) and therefore, is not approapriate in this situation. Furthermore, since chronic effects of FeSi high Ba have not been observed in the crustacean Daphnia magna at an initial loading of 100 mg/L it is unlikely that there will be either acute or chronic effects observed in aquatic organisms and therefore no environmental hazard classification is proposed for FeSi.

No indications of endocrine disrupting effects have been observed in any of the studies.

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