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Environmental fate & pathways

Biodegradation in soil

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Description of key information

Dowfax 8390 was observed to be biodegradable in soil. 

Key value for chemical safety assessment

Half-life in soil:
53 d
at the temperature of:
21 °C

Additional information

In a soil and sediment study, within one year, mineralization of [14C]MADS to 14CO2 was observed in all of the soil and sediment mixtures, with an average of 51 ± 19% of the radioactivity added (± 1 standard deviation). Mineralization of [14C]MADS in biologically-inhibited controls, prepared with 2% formalin, was </= 0.3%, confirming that the mineralization observed in the viable mixtures was biologically mediated. Since these soils and sediments came from diverse environments, these results indicate that microorganisms capable of completely degrading DOWFAX 8390 Surfactant appear to be ubiquitous. Mineralization of [14C]MADS reached 3 to 8% after 3 weeks. This level of mineralization was consistent with results from previous biodegradation studies using fresh, un-acclimated activated sludge.