Registration Dossier

Environmental fate & pathways

Endpoint summary

Currently viewing:

Administrative data

Description of key information

Additional information

If ethanol is present in ambient air, it is expected to exist almost entirely in the vapour phase, based on the physicochemical properties cited in chapter 4. This substance is not expected to absorb UV light in the environmentally significant range of >290 nm and is not therefore expected to undergo direct photolysis on sunlit soil surfaces, in the atmosphere or in aquatic environments. However, experimental data backed up by modelling predicts that it is likely to undergo indirect photolysis through hydroxyl radical reaction at a slow to moderate rate, with an estimated half life of 36 -40 hours at an OH concentration of 1.56million OH/cm3 and a 12 hour day). A figure of 38 hours is used for the half life.

Ethanol is considered resistant to hydrolysis but since it is readily biodegradable, no further data is required. There is no data available on phototransformation in water or soil.