permanganaten.
/pəˈmaŋɡəneɪt/, /pəˈmaŋɡənət/, U.S. /ˌpərˈmænɡəˌneɪt/, /ˌpərˈmænɡənət/ Chemistry.
A salt of permanganic acid; a salt containing the manganese oxyanion MnO4− present in that acid.
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the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > (per)manganates
manganesate1819
manganesiate1823
manganate1839
permanganate1841
1841 W. T. Brande Man. Chem. (ed. 5) 725 Permanganate of Ammonia.
1856 W. A. Miller Elements Chem. II. 921 Most of the permanganates are freely soluble in water.
1885 C. F. Holder Marvels Animal Life 128 Permanganate of potash is the best antidote to the poison of snakes.
1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 17 Solutions of manganates (e.g. K2MnO4 = K2O.MnO3) are green; those of permanganates (e.g. KMnO4 or K2Mn2O8 = K2O.Mn2O7)..rose or purple.
1938 R. Hum Chem. for Engin. Students xxviii. 781 Condy's Fluid is largely sodium permanganate solution.
1955 J. C. Giblin Qualitative & Volumetric Anal. (ed. 2) iv. ii. 117 Titrate with the standard solution of permanganate until the colour changes from greenish-yellow to yellowish-pink.
1989 M. C. Smith Polar Star i. xvi. 191 If a prisoner tattooed something they didn't like, they burned it off with permanganate of potash.
2001 O. Sacks Uncle Tungsten viii. 81 The permanganates, by contrast, where the manganese ion was heptavalent, were all deep purple.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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n.1841