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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The biodegradability of polysulfide di-tert-nonyl has been read across from polysulfide di-tert-dodecyl. Polysulfide di-tert-dodecyl is not readily biodegradable, with 0% degradation after 28 days.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The biodegradability of polysulfide di-tert-nonyl has been read across from polysulfide di-tert-dodecyl. Feil (2009) is a ready biodegradability manometric respiration test, following OECD guideline 301F. This is a GLP compliant, aerobic, activated sludge study. It did not fulfil the validity criteria as the oxygen demand of the inoculum control (medium and inoculum) was 20 mg O2/L rather than the 60 mg/L or above within 28 days as required. Polysulfide di-tert-dodecyl is not readily biodegradable, with 0% degradation after 28 days.