Manganese(II) chloride

Manganese(II) chloride is an ionic compound of manganese in the +2 oxidation state and chloride ions, with formula MnCl₂. It occurs in anhydrous and hydrated forms, especially the pink tetrahydrate.

Manganese: Manganese is a chemical element with atomic number 25 and several common oxidation states. Its +2 oxidation state defines the metal ion in MnCl₂.
Hydration: Hydration is the association of water molecules with ions or molecules. Water coordinates Mn²⁺ when the salt dissolves or crystallizes as a hydrate.
Manganese electroplating: Manganese electroplating deposits metallic manganese onto a surface using an electric current. MnCl₂ can supply manganese ions in electrolyte formulations for manganese deposition.
Manganese toxicity: Manganese toxicity is harm caused by excessive manganese exposure, especially to the nervous system. Exposure to MnCl₂ can contribute to excessive manganese intake or inhalation.
Chloride: Chloride is the negatively charged chlorine ion, Cl⁻. Two chloride ions balance each Mn²⁺ ion in the salt.
Dissolution: Dissolution is the process by which a solute disperses into a solvent to form a solution. In water, MnCl₂ separates into hydrated manganese and chloride ions.
Manganese ferrite: Manganese ferrite is a magnetic spinel oxide with formula MnFe₂O₄. MnCl₂ can provide manganese during preparation of this ferrite material.
Chloride corrosion: Chloride corrosion is material degradation promoted by chloride ions, especially in metals. Chloride from the salt can contribute to corrosion in susceptible metal systems.
Ionic compound: An ionic compound consists of oppositely charged ions held together by electrostatic attraction. MnCl₂ is classified by its manganese and chloride ions.
Crystal structure: A crystal structure is the ordered arrangement of atoms, ions, or molecules in a crystalline solid. Anhydrous MnCl₂ and its hydrates have distinct solid-state arrangements.

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