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EC number: 700-934-5 | CAS number: -
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Determination of a photolysis rate of EUF or its hydrolysis products seems scientifically not justified
Key value for chemical safety assessment
Additional information
The molecular structures of EUF components have no chromophore. In
addition, the UV spectrum of EUF does not show any absorption of light
with wave-lengths > 230 nm. Substances without significant UV/absorption
> 290 nm cannot undergo direct photolysis in sunlight. EUF has a UV
absorption maximum < 230 nm and therefore no direct photolysis in the
atmosphere is expected.
The vapour pressure of several constituents was estimated to be in the
range between 2.21∙10-6 Pa and 8.6 Pa at 25°C indicating that some of
the constituents of the reaction mixture are slightly volatile (> 0.01
Pa). Therefore, photodegradation in air could be relevant. However, the
partial pressures are expected to be relatively low. Moreover, due to
hydrolysis most of theses substances are not stable as pure substance
and thus it is expected that these substances are also not stable in
air. Overall, degradation by photolysis in the atmosphere is considered
to be only of minor importance, as no significant volatilisation of EUF
constituents is expected. Information on the behaviour in air for the
hydrolysis products formaldehyde and ethylene glycol (see below) are
assumed to be scientifically sufficient.
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