CAS RN:107-15-3

Soil Adsorption / Mobility

Ethylenediamine has two primary amine groups and at the pH range found in most soils it is expected to be partially protonated given a pKa1 of 10.7 and a pKa2 of 7.6(1). An average Koc of 4766 (range=2071 to 6160) was measured for ethylenediamine in six different soils; five were from the vadose zone and one from an aquifer (saturated zone)(2). pH values ranged from 6.0 to 9.6 and the fraction of organic carbon from 0.0024 to 0.0391 for this group of soils. Soils with increased cation exchange capacity and organic content had greater affinity for ethylenediamine(2).
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