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W156 - Health and Safety Advisory: Toxic Exposure to Manganese in Welding Fume

The welding process can release toxic fume into the air. Breathing in this toxic welding fume, especially over time, can have serious health effects.

Exposure to manganese is regulated under Regulation 833: Control of Exposure to Biological or Chemical Agents. Manganese is added to certain metals such as steel and aluminum and, even more commonly, is found in welding rods, welding wire, and the flux coating on electrodes.

This advisory outlines the health effects of manganese, the factors that can increase manganese exposure, and the control methods for limiting exposure to welding fume. 2 pages. April 2014.

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