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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Diphenyl sulphone does not biodegrade in a simulation test with natural surface water, according to test guideline OECD 309.

Key value for chemical safety assessment

Half-life in freshwater:
800 d
at the temperature of:
12 °C
Half-life in freshwater sediment:
140 d

Additional information

The objective of this study was to determine the degradation rate and degradation products of [14C]-
Diphenyl sulphone in a natural aerobic surface water in the dark, according to the OECD
309 testing guideline. Two different concentrations (10 μg/L and 95 μg/L) were applied per system.
The mineralisation rate was negligible. The DT50 values for [14C]- Diphenyl sulphone were determined to be 800 days (10 μg/L) and 1210 days (95 μg/L) in the water phases. Therefore, [14C]-Diphenyl sulphone is very persistent.