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Environmental fate & pathways

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Methanol is readily biodegradable in water, soil and sediments, both under aerobic and anaerobic conditions.

Compared to other loss mechanisms identified, including volatilization and chemical degradation, biodegradation is expected to be the dominant process controlling the fate of methanol in the soil, groundwater, and surface water environments.

Methanol is degraded in the atmosphere by photochemical, hydroxyl-radical dependent reactions. The estimated elimination half-life is calculated to be about 17.2 days.Due to the high solubility of methanol in water and its low octanol-water partition coefficient adsorption to soil is considered to be negligible. Given the value of the Henry's Law constant, once in water, methanol is likely to remain in the aqueous phase.No bioaccumulation is expected.