Silver permanganate

Crystal structure
__ Ag +      __ Mn 7+      __ O 2−
General
Surname	Silver permanganate
other names	Silver manganate (VII)
Ratio formula	AgMnO 4
Brief description	black solid
External identifiers / databases
CAS number 7783-98-4 EC number 232-040-1 ECHA InfoCard 100.029.127 PubChem 11424678 ChemSpider 9599554 Wikidata Q2095857
properties
Molar mass	226.8 g mol −1
Physical state	firmly
density	4.49 g cm −3
Melting point	160 ° C (decomposition)
solubility	poorly soluble in water (silver permanganate 9 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver permanganate is an inorganic chemical compound of silver from the group of permanganates .

Extraction and presentation

Silver permanganate can be obtained by reacting a silver nitrate solution with potassium permanganate at 80 ° C.

${\displaystyle \mathrm {KMnO_{4}+AgNO_{3}\longrightarrow AgMnO_{4}\downarrow +\ KNO_{3}} }$

properties

Silver permanganate is a light-sensitive purple to black solid with shiny metallic, needle-shaped crystals that is sparingly soluble in water. Decomposition begins when heated to over 160 ° C or when stored for a long time. It has a monoclinic crystal structure with the space group P 2 ₁ / n (space group no. 14, position 2) and the lattice parameters a = 567 pm, b = 827 pm, c = 713 pm, β = 92.5 °.

use

Silver permanganate is used in gas masks and as an antiseptic .

Individual evidence

1. ↑ ^{a b c d e} Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1586.
2. ↑ ^{a b c d} Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 369 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.