Silver permanganate

Silver permanganate
Names
	IUPAC name Silver(I) permanganate
	Systematic IUPAC name Silver(I) manganate(VII)
	Other names Argentous permanganate
Identifiers
CAS Number	7783-98-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	9599554;
ECHA InfoCard	100.029.127
EC Number	232-040-1;
PubChem CID	11424678;
UNII	A61162P82P ;
CompTox Dashboard (EPA)	DTXSID10228455 ;
	InChI InChI=1S/Ag.Mn.4O/q+1;;;;;-1 Key: FBDQITNNUANGAD-UHFFFAOYSA-N; InChI=1/Ag.Mn.4O/q+1;;;;;-1/rAg.MnO4/c;2-1(3,4)5/q+1;-1 Key: FBDQITNNUANGAD-URBVJNAFAD;
	SMILES [Ag+].[O-][Mn](=O)(=O)=O;
Properties
Chemical formula	AgMnO4
Molar mass	226.804 g/mol
Appearance	purple crystals or gray powder
Density	4.27 g/cm3
Melting point	160 °C (320 °F; 433 K) (decomposes)
Solubility in water	0.55 g/100 mL (0 °C) ; 1.69 g/100 mL (30 °C)
Magnetic susceptibility (χ)	−63.0·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Eye irritant
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H272, H312, H319, H332
Precautionary statements	P210, P220, P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P311, P321, P330, P337+P313, P362+P364, P370+P378, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Silver permanganate is an inorganic compound with the chemical formula AgMnO₄. This salt is a purple crystal adopting a monoclinic crystal system.^[1] It decomposes when heated or mixed with water, and heating to high temperature may lead to explosion.

Production

It can be produced through the reaction of silver nitrate and potassium permanganate:^[2]

AgNO₃ + KMnO₄ → AgMnO₄ + KNO₃

Uses

Silver permanganate is an oxidizing agent for carbon monoxide when deposited on metallic oxide carriers.^[3] As a result, it was investigated for use in gas masks but was ultimately abandoned due to its expense and it being consumed in the reaction rather than acting as a catalyst.^[4]

Related compounds

A caesium silver permanganate with the formula Cs₃Ag[MnO₄]₄ has been characterized.^[5]

References

^ Boonstra, E. G. (14 August 1968). "The crystal structure of silver permanganate". Acta Crystallographica Section B. 24 (8): 1053–1062. Bibcode:1968AcCrB..24.1053B. doi:10.1107/S0567740868003699.
^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
^ "The Heterogeneous Oxidation of Carbon Monoxide", Advances in Catalysis, vol. 5, Academic Press, p. 191, 1953-01-01, doi:10.1016/S0360-0564(08)60642-2, retrieved 2026-02-26
^ Lamb, Arthur B.; Bray, William C.; Frazer, J. C. W. (1920-03-01). "The Removal of Carbon Monoxide from Air". Journal of Industrial & Engineering Chemistry. 12 (3): 217. doi:10.1021/ie50123a007. ISSN 0095-9014.
^ Bauchert, Jörg M.; Henning, Harald; Schleid, Thomas (September 2012). "Synthesis and Crystal Structure of the Cesium Silver Permanganate Cs 3 Ag[MnO 4 ] 4". Zeitschrift für anorganische und allgemeine Chemie (in German). 638 (11): 1780–1783. doi:10.1002/zaac.201200250. ISSN 0044-2313.

[1] Boonstra, E. G. (14 August 1968). "The crystal structure of silver permanganate". Acta Crystallographica Section B. 24 (8): 1053–1062. Bibcode:1968AcCrB..24.1053B. doi:10.1107/S0567740868003699.

[2] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.

[3] "The Heterogeneous Oxidation of Carbon Monoxide", Advances in Catalysis, vol. 5, Academic Press, p. 191, 1953-01-01, doi:10.1016/S0360-0564(08)60642-2, retrieved 2026-02-26

[4] Lamb, Arthur B.; Bray, William C.; Frazer, J. C. W. (1920-03-01). "The Removal of Carbon Monoxide from Air". Journal of Industrial & Engineering Chemistry. 12 (3): 217. doi:10.1021/ie50123a007. ISSN 0095-9014.

[5] Bauchert, Jörg M.; Henning, Harald; Schleid, Thomas (September 2012). "Synthesis and Crystal Structure of the Cesium Silver Permanganate Cs 3 Ag[MnO 4 ] 4". Zeitschrift für anorganische und allgemeine Chemie (in German). 638 (11): 1780–1783. doi:10.1002/zaac.201200250. ISSN 0044-2313.

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