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EC number: 203-929-1
CAS number: 112-03-8
experimentally determined Koc values of 282,624 and 2,658,608 (log Koc:
5.5 to 6.4) indicate that the read-across substance C12-16 ADBAC will
adsorb to soil, does not easily desorb and can be considered immobile.
Cationic surfactants adsorb to soil mainly due to ionic interaction with
negatively charged surfaces. This means that there will be a poor
correlation with organic carbon in soil and that sorption should not be
normalized to the organic matter content in soil. Rather, the average Kd
values should be used to estimate the solids-water partition coefficient
in soil. When organic matter is not a determining factor in distribution
in soil, sediment and suspended sediment, there is no difference in
adsorption to these three compartments (based on dry weight) as the
organic matter content is the only variable. This means that the
solids-water partition coefficients in sediment and suspended sediment
are both equal to 13,630 L/kg.
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