| Volatilization | A pKa of 10.78(1) indicates n-butylamine will exist almost entirely in the cation form at pH values of 5 to 9 and therefore volatilization from water surfaces is not expected to be an important fate process(2). The potential for volatilization of n-butylamine from dry soil surfaces may exist(SRC) based upon a vapor pressure of 92.9 mm Hg(5).
Literature: (1) Perrin DD; Dissociation constants of organic bases in aqueous solution. IUPAC Chem Data Ser, Buttersworth, London (1965) (2) Doucette WJ; pp. 141-188 in Handbook of Property Estimation Methods for Chemicals. Boethling RS, Mackay D, eds. Boca Raton, FL: Lewis Publ (2000) (3) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Chemicals: Data Compilation. Design Inst Phys Prop Data, Amer Inst Chem Eng NY, NY: Hemisphere Pub Corp 5 Vol (1995) |
| Soil Adsorption | The Koc of n-butylamine has been determined to be 15, 105 and 107 in Podzol soil, Alfisol soil and sediment, respectively(1). According to a classification scheme(2), these Koc values suggest that n-butylamine is expected to have high mobility in soil(SRC). The pKa of n-butylamine is 10.78(3) indicating that this compound will exist almost entirely in the cation form in the environment and cations generally adsorb more strongly to soils containing organic carbon and clay than their neutral counterparts(4).
Literature: (1) Von Oepen B et al; Chemosphere 22: 285-304 (1991) (2) Swann RL et al; Res Rev 85: 23 (1983) (3) Perrin DD; Dissociation constants of organic bases in aqueous solution. IUPAC Chem Data Ser, Buttersworth, London (1965) (4) Doucette WJ; pp. 141-188 in Handbook of Property Estimation Methods for Chemicals. Boethling RS, Mackay D, eds. Boca Raton, FL: Lewis Publ (2000) |
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