permanganicadj.
/ˌpəːmanˈɡanɪk/, /ˌpəːmaŋˈɡanɪk/, U.S. /ˌpərmænˈɡænɪk/, /ˌpərmæŋˈɡænɪk/ Chemistry.
Containing manganese in its highest oxidation state, 7; permanganic acid n. a strong acid, HMnO4, known only as a purple aqueous solution.
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perlate acid1785
permanganic acid1836
rhodizonic acid1838
1836 W. T. Brande Man. Chem. (ed. 4) 635 Permanganic Acid. It is supposed by Mitscherlich, that the salt obtained by adding peroxide of manganese to fused chlorate of potassa,..contains manganese in the highest state of oxidizement.
1865–72 H. Watts Dict. Chem. III. 819 Permanganate of Hydrogen, or Permanganic acid, Mn2 H2O8.
1879 Cassell's Techn. Educator (new ed.) IV. 255/2 The ores of manganese may readily be detected by the fine red colour of permanganic acid.
1922 T. M. Lowry Inorg. Chem. xl. 759 It gives a green solution which appears to contain a permanganic sulphate, (MnO3)2SO4.
1955 J. C. Giblin Qualitative & Volumetric Anal. (ed. 2) i. 16 If the solution is heated the permanganic acid will decompose.
1981 P. Sykes Guidebk. to Mechanism in Org. Chem. (ed. 5) vii. 186 This..is thought to proceed via cyclic (cis) permanganic esters.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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adj.1836