Potassium permanganate

Potassium permanganate
Names
	IUPAC name Potassium manganate(VII)
	Systematic IUPAC name Potassium permanganate
	Other names Chameleon mineral; Condy's crystals; Permanganate of potash; Hypermangan; Purple potion powder; Permanganic acid, potassium salt; Purple salt;
Identifiers
CAS Number	7722-64-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:231501;
ChEMBL	ChEMBL3833305;
ChemSpider	22810;
DrugBank	DB13831;
ECHA InfoCard	100.028.874
EC Number	231-760-3;
KEGG	D02053 ;
PubChem CID	516875;
RTECS number	SD6475000;
UNII	00OT1QX5U4;
UN number	1490
CompTox Dashboard (EPA)	DTXSID2034839 ;
	InChI InChI=1S/K.Mn.4O/q+1;;;;;-1 Key: VZJVWSHVAAUDKD-UHFFFAOYSA-N ;
	SMILES [K+].[O-][Mn](=O)(=O)=O;
Properties
Chemical formula	KMnO4
Molar mass	158.032 g·mol−1
Appearance	Purplish-bronze-gray needles; purple in solution
Odor	odorless
Density	2.7 g/cm3
Melting point	240 °C (464 °F; 513 K) (decomposes)
Solubility in water	76 g/L (25 °C); 250 g/L (65 °C)
Solubility	soluble in organic solvents; decomposes in alcohol
Magnetic susceptibility (χ)	+20.0·10−6 cm3/mol
Refractive index (nD)	1.59
Structure
Crystal structure	Orthorhombic, oP24
Space group	Pnma, No. 62
Lattice constant	a = 0.909 nm, b = 0.572 nm, c = 0.741 nm
Formula units (Z)	4
Thermochemistry
Heat capacity (C)	119.2 J/mol K
Std molar; entropy (S⦵298)	171.7 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	−813.4 kJ/mol
Gibbs free energy (ΔfG⦵)	−713.8 kJ/mol
Pharmacology
ATC code	D08AX06 (WHO) V03AB18 (WHO)
Hazards
	GHS labelling:
Pictograms
NFPA 704 (fire diamond)	2 0 2 OX
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1090 mg/kg (oral, rat)
Related compounds
Other anions	Potassium pertechnetate; Potassium perrhenate
Other cations	Sodium permanganate; Ammonium permanganate; Calcium permanganate; Silver permanganate
Related manganates	Potassium hypomanganate; Potassium manganate
Related compounds	Manganese heptoxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Potassium permanganate is an inorganic compound with the chemical formula KMnO₄. It is a purplish-black crystalline salt, which dissolves in water as K⁺ and MnO⁻
₄ ions to give an intensely pink to purple solution.

Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also traditionally as a medication for dermatitis, for cleaning wounds, and general disinfection. It is on the World Health Organization's List of Essential Medicines. It has a great variety of niche uses such as biocide for water treatment purposes and for tanning and dyeing cloth. In 2000, worldwide production was estimated at 30,000 tons.

It is also referred to as chameleon mineral, Condy's crystals, permanganate of potash, hypermangan, purple potion powder, permanganic acid (potassium salt), and purple salt.