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Environmental fate & pathways

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N-Methylaniline has a relatively low potential to adsorb to soil and if released on soil may leach (Von Oepen et al. 1991). It may photodegrade on the soil surface (Kondo, 1978). N-methylaniline slowly reacts with humic material in soil (Parris, 1980). As it is inherently biodegradable, it is expected to biodegrade in soil with a relatively high organic content and sufficient microbial activity. It is easily oxidized (Budavari et al. 1989) and may thus react with natural oxidants in soil.

N-Methylaniline is estimated to have a relatively high Henry's Law constant and would therefore be expected to volatilize from water. Its volatilization half-life in a model river and model lake is estimated to be 3.5 and 28 days, respectively. It may also photodegrade in surface water (Kondo, 1978) or be oxidized (Budavari et al. 1989) by naturally-occurring oxidants in the water body. N-Methylaniline would not be expected to adsorb to sediment or bioconcentrate in fish.

N-Methylaniline should exist in the atmosphere as a vapor and react with photochemically-produced hydroxyl radicals with an estimated half-life of 8.8 hr. It may also photolyze or oxidize while in the vapor phase or in aerosols. N-Methylaniline is soluble in water and therefore should be scavenged by rain.

Workers may be occupationally exposed to N-methylaniline by dermal contact or inhalation (NIOSH, 1989). The general population will be exposed by ingesting vegetables or fruit in which it naturally occurs (NIOSH, 1989; Neurath et al. 1977; Thomas and Bassols, 1992).