nitrous acid(redirected from Hno2)
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A weak inorganic acid, HNO2, existing only in solution or in the form of its salts.
(Elements & Compounds) a weak monobasic acid known only in solution and in the form of nitrite salts. Formula: HNO2. Systematic name: dioxonitric(III) acid
an acid, HNO2, known only in solution.