Magnesium chloride is a chemical compound represented by the formula MgCl₂, indicating its chemical structure composed of magnesium (Mg) and two chloride ions (Cl). It is widely used in various fields, including medicine, agriculture, and water treatment.

In diluted solution, potassium permanganate is used for water treatment. It also serves as a disinfectant at a concentration of 0.5 grams per liter, commonly employed for washing vegetables in tropical countries.