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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Expected as neither readily either inherently biodegradable

Key value for chemical safety assessment

Type of water:
freshwater

Additional information

The substance is a cationic disazo dye. Basic Orange 064 is not expected to be ready biodegradable because of its chemical structure and the specific function. Commonly, dyes undergo a primary transformation, i.e. discolourization due to the interrupting the conjugation. Nevertheless, the degradation process involves more steps and take more time.

There are no experimental information on Basic Orange 064, thus the substance biodegradability potential has been evaluated using an estimation tool. The QSAR based screening criterion for identifying substances for persistency (P and vP) confirmed that the substance is expected to be persistent.