Definition of perrhenic acid
: either of two acids formed by the oxidation of rhenium or rhenium compounds of lower valence states and known only in solution or in the form of salts: a : the monobasic acid HReO4 analogous to permanganic acid that forms colorless stable salts —called also metaperrhenic acid b : the tribasic acid H3ReO5 that forms yellow salts turning red when heated and hydrolyzed in water to salts of metaperrhenic acid —called also mesoperrhenic acid
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Origin and Etymology of perrhenic acid
per- + New Latin rhenium + English -ic
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