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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Not readily biodegradable (according to OECD criteria).

Additional information

The described 'red disazo condensation pigment' is practically insoluble and therefore considered to be essentially not bioavailable. Due to the large molecular size, cellular uptake of the pigment is unlikely. Hence intracellular biodegradation, which is the main degradation route of bacteria, is probably low. It can be concluded that the substance is likely to persist in the environment. The conclusion is supported by two model calculations that showed no biodegradation for the pigment.

Biodegradation tests in water, sediment or soil are not proposed, since no relevant new findings are expected from such investigations.