Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

As the rapid hydrolysis is the driving force for the fate and pathways of this substance, the abiotic degradation can be used to demonstrate fast degradation for this substance. This is justified as all decomposition products have been identified (key study on hydrolysis including Tier 3 approach; Brekelmans 2013). The most relevant degradation product (n-butanol) is readily biodegradable (Gerhold and Malaney 1966 & McKinney and Jeris 1955). The 20-d biodegradation-% (BOD test) of n-butanol using settled domestic wastewater was 92 % of ThOD in freshwater and 82 % of ThOD in synthetic sea water at nominal test concentrations of 3, 7 and 10 mg/l (Price et al. 1974). The other environmentally non-hazardous degradation product (TiO2) is inorganic and insoluble, lacking bioavailability, and therefore not relevant to be considered in CSA.