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Methylcyclopentadienyl Manganese Tricarbonyl )(MMT)
Description
he principal organic manganese compound is methylcyclopentadienyl manganese tricarbonyl (MMT), an anti-knock additive. Combustion of gasoline containing this additive releases submicron particles of Mn3O4, which may penetrate deeply into the bronchial areas of the respiratory system. High exposure to airborne manganese has been associated with severe neurotoxic effects (Iregren, 1999). It has been proposed that even showering could also contribute to manganese intake by inhalation of aerosols (Elsner and Spangler, 2005). Exposure to manganese through welding fumes is associated with more aerosolized and smaller (ultrafine) particles of manganese. Metal particles generated from experimental welding fume exposure have been shown to be taken up by olfactory neurons and transynaptically transported in the brain (Elder et al., 2006).
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