Manganese(II) chloride is an inorganic chloride in which manganese(II) is coordinated to two chloride ions. In its anhydrous state manganese(II) chloride is a polymeric solid, which adopts a layered cadmium chloride-like structure. It has a role as a nutraceutical.
Manganese(II) chloride tetrahydrate is a hydrate that is the tetrahydrate form of manganese(II) chloride. It has a role as a nutraceutical and a MRI contrast agent. It is a hydrate, an inorganic chloride and a manganese coordination entity.
Manganese dioxide (MnO2) is an inorganic compound. It is a black to brown-colored material that occurs naturally as the mineral pyrolusite