Home Chemistry Potassium Permanganate Molecular Mass: Everything You Need To Know

Potassium Permanganate Molecular Mass: Everything You Need To Know

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Potassium Permanganate is a chemical compound with the molecular formula KMnO4. It is a strong oxidizing agent and is widely used in various applications such as water treatment, metal finishing, and chemical synthesis. In this article, we will discuss the molecular mass of Potassium Permanganate and its significance in various fields.

The Molecular Mass of Potassium Permanganate

The molecular mass of Potassium Permanganate is calculated by adding the atomic masses of its constituent atoms. The molecular formula of Potassium Permanganate is KMnO4, which means it contains one potassium atom (K), one manganese atom (Mn), and four oxygen atoms (O). The atomic mass of potassium is 39.1, the atomic mass of manganese is 54.9, and the atomic mass of oxygen is 16. Therefore, the molecular mass of Potassium Permanganate can be calculated as follows: Molecular mass of KMnO4 = (1 x 39.1) + (1 x 54.9) + (4 x 16) = 158.03 g/mol

Significance of Molecular Mass

The molecular mass of a compound is an important parameter that helps in determining its physical and chemical properties. It is also used in various calculations such as molar mass, stoichiometry, and empirical formula determination. In the case of Potassium Permanganate, its molecular mass determines its density, melting point, and boiling point. It also helps in calculating the amount of Potassium Permanganate required for a particular reaction or process.

Applications of Potassium Permanganate

Potassium Permanganate has a wide range of applications in various fields. It is commonly used as a disinfectant and water treatment agent due to its strong oxidizing properties. It is also used in the metal finishing industry to remove impurities and improve the surface finish of metals. In addition, Potassium Permanganate is used in chemical synthesis to oxidize organic compounds and as a reagent in analytical chemistry.

Precautions While Handling Potassium Permanganate

Potassium Permanganate is a highly reactive compound and should be handled with care. It can cause skin and eye irritation and can be toxic if ingested or inhaled. Therefore, it is important to wear protective clothing, gloves, and goggles while handling Potassium Permanganate. It should also be stored in a cool, dry, and well-ventilated area away from heat, flames, and incompatible materials.


In conclusion, Potassium Permanganate is a widely used chemical compound with a molecular mass of 158.03 g/mol. Its molecular mass plays a crucial role in determining its physical and chemical properties and in various calculations related to its applications. However, it should be handled with care due to its reactive nature and potential health hazards.