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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Endpoint:
biodegradation in water: sediment simulation testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
As an inorganic substance with the chemical structure "C", bulk and nanoforms of carbon black (with and without surface treatment) which essentially are carbon in its elemental state, cannot be used as a carbon source and cannot be biodegraded by microorganisms.The generally accepted guidelines for the examination of  the biodegradability of substances (i.e., OECD- and EU-guidelines) can be used only for organic substances. Biodegradation testing has no meaning for inorganic substances, including inorganic (nano)materials. A biodegradation study is not scientifically justified. In addition, carbon black is highly insoluble in water.
Transformation products:
no
Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
As an inorganic substance with the chemical structure "C", bulk and nanoforms of carbon black (with and without surface treatment), which essentially are carbon in its elemental state, cannot be used as a carbon source and will not be biodegraded by microorganisms. The generally accepted guidelines for the examination of  the biodegradability of substances (i.e., OECD- and EU-guidelines) can be used only for organic substances. Biodegradation testing has no meaning for inorganic substances, including inorganic (nano)materials. A biodegradation study is not scientifically justified. In addition, carbon black is highly insoluble in water.
Transformation products:
no

Description of key information

As an inorganic substance with the chemical structure "C", bulk forms of carbon black cannot be used as a carbon source and will not be biodegraded by microorganisms. The generally accepted guidelines for the examination of  the biodegradability of substances (i.e., OECD- and EU-guidelines) can be used only for organic substances. Biodegradation testing has no meaning for inorganic substances, including inorganic nanomaterials. A biodegradation study is not scientifically justified. In addition, carbon black is highly insoluble in water.

Key value for chemical safety assessment

Additional information