Canadian Council of Ministers
of the Environment

Le Conseil canadien des ministres
de l'environnement

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Documents for Public Review and Comment: Canadian Water Quality Guidelines for the Protection of Aquatic Life: Manganese

August 17, 2018

Draft Canadian Water Quality Guidelines for the Protection of Aquatic Life: Manganese are available for public review and comment until September 18, 2018.

Manganese (Mn; CAS 7439-96-5) is a naturally occurring and abundant Group 7 metal. In the aquatic environment, manganese predominantly exists as manganous (Mn2+) and manganic (Mn4+) forms and transitions between these two forms via oxidation or reduction reactions. Manganese can form complexes with many organic ligands and has a variety of salts, which are mostly readily soluble in water.

In Canada, manganese is primarily used as both an additive and alloy for steel production. The second-largest market for manganese is the production of dry-cell alkaline batteries, where manganese dioxide is used as a depolarizer. Manganese is also present in thousands of everyday metallic items and non-metallic products. Canada currently imports all of its manganese.

Please submit comments to:

Megan Krohn
Canadian Council of Ministers of the Environment
360 - 123 Main Street
Winnipeg, MB    R3C 1A3
Email: mkrohn@ccme.ca