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EC number: 202-617-2
CAS number: 97-90-5
In a valid guideline study a degradation rate of 69 % was obtained after
28 days, thus the test substance Ethylene glycol dimethacrylate has to
be classificated as readily biodegradable, but failing 10-day window.
NOTE: Any of data in this dataset are disseminated by the European Union
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Oxygen contents and calculations of the degradation rate of the
test substance and the reference substance
According to the measured values of O2
-concentrations (in dependance of time, x) in the test vessels (with/without test
material/inoculum) via O2
-electrode, was calculated the BODx (Biological Oxygen Demand, in dependance of time, x). Via the BODx,
the ThOD and the concentration of the test substance EGDMA (Ethylene
dimethacrylate) in solution, the biotic Degradation at time x was calculated. The
calculation of Dt, the biodegradation rate in time, was performed
according to the following formula: Dt(%) = [(mg BODx /l) : (mg
Subst / l x ThOD)] x 100 Description of the curve of biodegradation (%): After a lag phase of about 10 days biodegradation takes
place. Within the following 10 days, after 10% biodegradation was exceeded, about 40% degradation was obtained.
degradation rate of 71.2% was obtained. Since degradation time (28 days), belonging to the degradation rate of about > 60%, exceeded
the 10 days window, Ethylene glycol
dimethacrylate has to be classificated according to the criteria of test evaluation as readily
biodegradable, but failing 10-day window.
According to different test guidelines (Screening tests OECD 301 F
and OECD 301 D) Ethyleneglycol dimethacrylate was assessed to be readily
biodegradable in activated sludge (> 60 % degradation within 28 days)
but failing the 10-day window. (Evonik Industries 2012 and 1990).
BIOWIN v4.10 prediction: readily biodegradable.
likely due to the kinetics of sequential metabolism since both primary
metabolites, Hydroxyethyl methacrylate and methacrylic acid are readily
biodegradable acc. OECD criteria. Consequently, it is expected that
Ethyleneglycol dimethacrylate will be ultimately biodegraded within 28
Ethyleneglycol dimethacrylate is assessed to be readily
biodegradable, but failing 10-day window. Utimate biogeradation is
expected within 28 days.
Hydroxyethyl methacrylate (CAS 868-77-9) and Methacrylic acid (CAS
79-41-4) are expected to be the primary metabolites of Ethyleneglycol
dimethacrylate. Both substances are readily biodegradable acc. OECD
criteria. Microbial metabolism simulator of OECD Toolbox version
3.3.0-132 generates in summary of both substances (HEMA and Methacrylic
acid) similar metabolites as Ethyleneglycol dimethacrylate itself. This
information supports the assumption that EGDMA will be biodegardable
utimately wthin 28 days.
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