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EC number: 203-710-0
CAS number: 109-83-1
A calculated logKoc of 0.115 is available
for the uncharged molecule (pKa value: 10.25). The pKa value indicates
that the molecule will exist primarily as a cation in the environment
and cations generally adsorb stronger to soils containing organic carbon
and clay than their neutral counterparts. Hence, the calculation model
may underestimate adsorption to organic carbon since it does not
consider the ionic structure of the molecule. Under environmental
conditions (pH from 5 to 8) the test substance is almost completely
present in its charged form. In a calculation conducted according to a
publication by Franco & Trapp (2008), using the parameters pKa = 9.95
and a logKow = -0.91 a logKoc value of 1.33 was determined at pH 5, 7,
and 8. This pH range was selected since this range represents 98 %
of the European soils.
If the substance is exposed to water, the
substance will not evaporate into the atmosphere from the water surface.
Additionally, volatilisation is expected to be neglible due to the ionic
structure of the molecule at environmental condititons.
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