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EC number: 203-933-3
CAS number: 112-07-2
No measured photodegradation data is available for butylglycol acetate.
The calculated Rate constant (for indirect photolysis) of 2 -butoxyethyl
acetate is : 21.2 E-12 cm³/(molecule*sec) with a resultant predicted
atmospheric half life of 6 hours. An alternative calculation method led
to a predicted rate constant of 19.5 E-12 cm3/(molecule*sec).
Degradation by hydrolysis at neutral pH is predicted to proceed at a
In a study which basically followed the methodology of a guideline
closed bottle ready biodegradation study and used non adapted domestic
sewage seed, 2 -butoxyethyl acetate was found to be readily
biodegradable, with 53% degradation after 5 days and 72% after 20 days.
In a biodegradation study according to OECD 301A, 2 -butoxyethyl acetate
showed 97% degradation within 7 days; the substance is readily
biodegradable according to this information. In a guideline respirometry
biodegradation study for which only the results are available,
degradation of 58% was achieved in 10 days with a final degradation of
88% in 28 days; the substance meets the criteria for ready
biodegradability according to this result. In an inherent biodegradation
study carried out according to guideline, 2 -butoxyethyl acetate reached
a degradation exceeding 90% within 6.5 days. Degradation proceeded at
about 12% per day. In summary, three ready biodegradation studies are
available and all indicate that the substance is readily biodegradable.
In a guideline simulation test of an aerobic sewage treatment plant for
which only the results are available, degradation of 96.7% was achieved
following 3 hours retention in the simulation reactor. This would
suggest that a higher factor than default can be used in predicting
environmental emissions to water following processing in industrial or
municipal WWTPs. Simulation studies are not normally required for
substances that are readily biodegradable.
This substance has a relatively low Logkow. The predicted BCF calculated
from this is 3.24.
Distribution modelling suggests that environmental concentrations of 2
-butoxyethyl acetate 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
30ug/l and air concentrations less than 40ppt.
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