Registration Dossier
Registration Dossier
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EC number: 203-905-0 | CAS number: 111-76-2
Endpoint summary
Administrative data
Description of key information
Additional information
The substance is readily degraded in the atmosphere by the action of sunlight; reactivity in the presence of hydroxyl radicals can be considered rapid. A number of biodegradation screening studies have been carried out using both adapted and unadapted innoculii and in both fresh and saltwater. The key biodegradation screening study clearly indicates that 2 -butoxyethanol is readily biodegradable in freshwater with non adapted bacterial populations. A further supporting study indicates that the substance is also readily biodegradable in saltwater. Studies using adapted innoculii also indicate ready biodegradability suggesting rapid degradation will occur in WWTPs. Distribution modelling suggests that environmental concentrations of 2 -butoxyethanol are likely to be very low. Based on a worse case assumption of all material being emitted to the environment with no abatement controls, water concentrations are predicted to be less than 0.7mg/l and air concentrations less than 0.1ppb. The substance is not likely to be hydrolysed under normal environmental conditions but, as the substance is readily biodegradable, this is of no consequence. As this substance has a low partition coefficient, bioaccumulation is not likely to be significant nor adsorption to soil or sediments. The complete miscibility of the substance in water suggests that volatilization from surface waters is not an important fate processes.
Bacteria capable of utilising 2 -butoxyethanol as a source of carbon are likely to be widespread.
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