Registration Dossier

Environmental fate & pathways

Biodegradation in soil

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The rate and route of p-toluenesulfonamide biodegradation depends on the soil type. But in each tested soil type p-toluenesulfonamide is totally mineralised. The worst case DT50 was found in humic sand soil and was 68 days.

Key value for chemical safety assessment

Half-life in soil:
68 d
at the temperature of:
20 °C

Additional information

One study, valid with restrictions, is available with Chloramine-T (CAS 127 -65 -1) Chloramine-T trihydrate is a strong oxidizing agent in aqueous solution and when brought into contact with organic matter (soil) it reacts and leaves p-tolunenesulfonamide as the only detectable transformation product, therefore this study can be used for p-TSA as well.

The rate and route of p-toluenesulfonamide biodegradation depends on the soil type. But in each tested soil type p-toluenesulfonamide is totally mineralised.

Sandy loam soil: Disappearance of p-toluenesulfonamide was calculated with DT50 and DT90 values of 30 days and 110 days, respectively.

Humic sand soil: Disappearance of p-tofuenesulfonamide was calculated with DT50 and DT90 values of 68 days and 249 days, respectively. 

Low humic content sand soil: The DT50 and DT90 values for the disappearance of p-toluenesulfonamide were estimated to be between 28 days and 56 days.