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EC number: 203-906-6
CAS number: 111-77-3
If 2 -(2 -methoxyethoxy)ethanol is present in ambient air, it is
expected to exist almost entirely in the vapour phase. 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, modelling predicts that it is likely to undergo indirect
photolysis through hydroxyl radical reaction at a reasonably fast rate,
with an estimated half life of 4.9 hours (0.41 days) at an OH
concentration of 1.5million OH/cm3 and a 12 hour day). Based on its
chemical structure, the substance is expected to be hydrolytically
stable under normal environmental conditions.
Most of the test data available on biodegradation was generated
according to international standard test guidelenes but the information
available is not generally comprehensive and lacks some information on
method details. However, the total set of information available is
regarded as being sufficient to draw a conclusion on the degradation
potential of 2 -(2 -methoxyethoxy)ethanol. Three guideline ready
biodegradation studies are available to two different methods. Two were
duplicate determinations to the same protocol. In a closed bottle test,
the substance reached 68% degradation after 28 days but did not meet the
10 day window criteria of 60%. The modified sturm test (CO2 evolution)
was repeated in duplicate. Both showed degradation of >75% after 28 days
but only one met the 10 day window criteria. Since the average of these
two results did meet the 10 day criteria, it can be concluded that 2 -(2
-methoxyethoxy)ethanol is readily biodegradable and does meet the 10 day
window, although this is marginal. Ready biodegradability is also
supported by QSAR modelling.
Based on the low logKow of this substance, the potential for
bioaccumulation is predicted to be very low.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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