(4-hydroxy-3-nitrophenyl)acetate is a monocarboxylic acid anion that is the conjugate base of (4-hydroxy-3-nitrophenyl)acetic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a (4-hydroxy-3-nitrophenyl)acetic acid. It is a conjugate acid of a (3-nitro-4-oxidophenyl)acetate.