Potassium Permanganate

Potassium Permanganate

CAS Number:7722‑64‑7

Synonyms:Potassium permanganate; KMnO₄; Permanganate of potash; Chameleon mineral

Chemical Formula:KMnO₄

Molecular Weight: 158.03 g/mol

Product Introduction

A dark purple crystalline solid—an extremely strong oxidizer and biocide. Widely used in organic syntheses, water treatment, wound disinfection, analytical chemistry, and pool purification.

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Physical & Chemical Properties

Property Value
Appearance Dark purple crystalline solid
Odor Odorless
Density ~2.70 g/cm³
Melting Point 240 °C (decomposes)
Solubility (water @20 °C) ~6.4–7 g/100 mL
Vapor Pressure Negligible
Purity (ACS reagent) ≥99% typical; insolubles ≤0.2%

Applications

  • Oxidant:oxidizing alkenes, alcohols, analytical titration (permanganometry)
  • Disinfectant:treats water, wounds, aquaculture uses
  • Analytical/organic reagent: TLC stain, permanganate value, industrial syntheses
  • Environmental: wastewater treatment, removing iron/H₂S, biocide

Safety Notes

  • Strong oxidizer; may cause fire/violence when mixed with organics. Harmful if swallowed and corrosive. GHS H272/H302/H314/H410. Use PPE, store in cool, dry place away from organics, avoid reducing agents.

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