Application: The product is generally used in manufacturing chemicals such as Manganese Sulphate, Manganese Carbonate, certain pesticides, fungicides etc. The production process is tailored such that non-acid soluble Manganese content is kept to a minimum. Also, additional steps are taken to control the iron and silica content in the material. Industrial/Chemical Grade: Appearance: Fine greenish-brown powder Total Manganese (Mn): 40% +/- 2% Manganese Oxide (MnO): 50-51% Iron as Fe: 20% max. Silica as SiO2: 20% max. Alumina as Al2O3: 5% max. Manganese Dioxide (MnO2: )2% max. Screen analysis 100 mesh (BSS): 95-100% Passing