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An antiseptic with mild fungistatic, bacteriostatic, anthelmintic, and amebicidal action. It is also used as a reagent and metal chelator, as a carrier for radio-indium for diagnostic purposes, and its halogenated derivatives are used in addition as topical anti-infective agents and oral antiamebics.

Normal oxychinolin sulphate, (C9H7ON)2H2SO4, a proprietary antiseptic, but not markedly germicidal.