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EC number: 249-276-6
CAS number: 28872-01-7
(Alkyl-dipropylene) triamines and
(tripropylene) tetramines are pronated under ambient conditions. This
means that they will sorb strongly to negatively charged substances like
glassware, soil and sediment constituents. For three different soils Kd
values were observed for C16 and C18' tri and tetraamines ranging from:
2.7 * 10^4 to 2.2 * 10^5 L/kg.
Biodegradation is considered to be the main
removal mechanism of this substance. Most ready biodegradability tests
are however hampered by the biocidal activity of these substances.
The half-life in the different environmental
compartments will be strongly influenced by the bioavailability of the
substances. No data are available for the determination of the half-life
of triamines and tetramines in soil or sediment. These values are
therefore estimated as a worst-case on the readily biodegradability of
the available fraction and the sorption data as determined in a sorption
Degradation in water:
Degradation in sea water:
Degradation in sediment:
Degradation in soil:
Triamines and tetramines have a short
predicted half-life in air but because
there are no important releases into the atmosphere and volatilisation
is expected to be negligible, this removal mechanism is thought to be of
photolysis of triamines and
tetraamines in air/water/soil
will not occur, because it does not absorb UV radiation above 290 nm. Photo
transformation in air/water/soil is therefore assumed to be negligible.
Standard OECD 305
tests are technically not feasible with these strongly sorbing
degradable substances. In addition is the route of exposure in a
standard OECD 305 test unrealistic for these substances because the
substance will either be sorbed or biodegraded. The bioaccumulation
potential of tri- and tetramine C16 -18 was therefore assessed based on
a measured log Kow (OECD 123). Using this observed log Kow of -0.3 . A
BCF of 3.162 L/kg ww is calculated using EPIweb v4.0. In vitro
biotransformation by rainbow trout hepatic subcellulair fraction has
been observed for primary alkyl amines and alkyl propane-1,3 -diamines.
It is therefore likely that also alkyl dipropylene triamines and alkyl
tripropylene tetramines are biotransformed.
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