Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The test substance is not readily biodegradable according to OECD 301 C.

4,4'-sulfonyldiphenol showed no biodegradation under aerobic conditions in tests conducted using river and seawater. Under anaerobic condition however the removal of 4,4'-sulfonyldiphenol in sediment reached about 60% after 60 days.

Although 4,4'-sulphonydiphenol is assessed as not readily biodegradable, there is evidence that the substance may be degraded by microbial populations after acclimatisation (BASF, 2006; BASF 2018). The role of adaptation in the biodegradation process is confirmed by studies demonstrating high removal of 4,4'-sulphonydiphenol from wastewater treatment plants (Qian Sun et al., Environmental Pollution 225: 542 -549, 2017; M. Cesen et al., Science of the Total Environment, 616 -617: 744 -752, 2018).

4,4'-sulphonyldiphenol was rapidly biodegraded in soils with observed half-lives of < 1 day.