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EC number: 629-732-4
CAS number: 1224966-13-5
amidoamine/imidazolines are mainly protonated under environmental
means that the protonated fraction will behave as salt in water and will
have a very low vapour pressure. A vapour pressure of 0.000079 and
0.000039 mPa were measured for respectivily the DETA and PEPA based
imidazoline at 20 °C. The solubility of this cationic surface active
substance will be influenced by the pH and is difficult to determine
because of the surface active properties. As an alternative as suggested
by the REACH guidance R.7 the CMC at pH 7 and 23°C was determined.
solubility in the form of CMC was measured for three types of
Imidazolines, i.e. the DETA, TEPA and PEPA based imidazolines.
partitioning of cationic surfactants to soil/sediment should not be
normalized to the organic carbon content as this normalisation assumes
partitioning to the organic carbon fraction alone. The
mean Kd can directly be used to calculate the soil and sediment-water
partition coefficient and its use prevents the erroneous influence of
the organic matter fraction on the exposure assessment.
47249 L/kg ==> Ksoil-water=
sediment the same mean Kd value should be used. For risk assessment
there is except for the organic matter fraction in soil/sediment no
intrinsic difference between soil and sediment and because there is no
OC normalisation applied the same
mean Kd should be used. This is not a new insight. This approach was
approved by TC NES II 2006 for the EU risk assessment of the cationic
primary alkyl amines.
it is known that suspended matter contains more small particles an
additional safety factor of 2 is applied for precautionary reasons to
the equilibrium partitioning coefficient for suspended sediment: Kdsusp
sed = 94498 L/kg ==> 23624.7
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