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EC number: 203-865-4
CAS number: 111-40-0
Biodegradation screening tests indicate poor biodegradability of
diethylenetriamine, due to toxicity/inhibition of the inoculum by the
high concentrations employed. A single test, using low ratio of test
substance to inoculum concentration, showed "ready biodegradabilty"
after an approximately 12 day lag phase. Simulation tests in activated
sludge, sewage, soil, and lake waters indicate that the substance is
rapidly and ultimately biodegraded in a wide range of environments, even
without having prior exposure/adaptation to the substance. The substance
has been shown to be completely removed in activated sludge wastewater
treatment process, following an adaptation period. Half-lives for
primary biodegradation in surface waters are on the order of 20 -28
days. The half-life for complete mineralization in surface soils is
conservatively estimated to be approximately 30 days. These results in
simulation tests are consistent with a "readily biodegradable" substance.
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