One of the mysteries of the English language finally explained.
A hygroscopic solid acid with strong oxidizing properties.
Chemical formula: H₅IO₆
- ‘Semi-thin sections were incubated first with periodic acid for 8 min, rinsed in distilled water and then treated in the dark with Schiff reagent for 15 min to reveal carbohydrates.’
- ‘We also note that atherinomorphs have periodic acid Schiff-positive yolk, but the phylogenetic significance of this observation remains to be determined with further surveys.’
Mid 19th century: from per- (sense 2)+ iodic acid.
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