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hypoiodous acid[¦hī·pō‚ī′ōd·əs ′as·əd]
HIO, a weak inorganic acid, existing only in weak aqueous solutions. It can dissociate both as an acid (HIO = H+ + IO-) and as a base (HIO = I+ + OH-). Its salts (hypoiodites) are also unstable, existing only in solutions, and are obtained by the action of iodine on alkaline solutions in the cold.