Registration Dossier
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EC number: 203-328-4 | CAS number: 105-76-0
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Ready biodegradation studies:
>70% (10d, DOC)
>60% (10d, CO2)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Four studies are available reporting the biodegradability of dibutylmaleinate. Three of them assess the ready biodegradability of the substance, and one study reports the inherent biodegradability. In two of the studies, a ready biodegradability could be shown, including a fulfilment of the ten-day window criterion. Both studies complement each other as they were conducted according to two different guidelines evaluating two different endpoint. One study reports a biodegradability of the substance, however, the ten-day window criterion was not met. In this study, the start of biodegradation was very much delayed in one of the replicate samples compared to the other sample. For this reason, the test was repeated, however, the same effects were again observed. An inhibition of bacterial growth was assumed for the delay of biodegradation. As the reason for that delay could not be clarified, this study is regarded as supporting information only. However, a potential biodegradability of dibutylmaleinate is supported by the results of the test on inherent biodegradability. Based on all available data, dibutyl maleinate is classified as readily biodegradable, fulfilling the ten day window criterion.
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