Used primarily in agriculture as a micronutrient in fertilizers to correct manganese deficiency in soils, especially for crops like citrus, soybeans, and potatoes. It supports photosynthesis and enzyme activation in plants.

It is also employed in the production of dry cell batteries as a precursor for manganese dioxide due to its electrochemical properties.

In the chemical industry, it serves as a precursor for manufacturing other manganese compounds and as a catalyst in oxidation reactions.

Additionally, it finds use in animal feed supplements to support metabolic functions and bone development in livestock.

Other applications include electroplating to enhance corrosion resistance, and in the textile and leather industries for dyeing and bath conditioning.

In laboratory settings, it acts as a source of Mn²⁺ ions for various synthesis and analytical procedures.