Is H2PO4 a acid or base?

H₂PO₄⁻, also known as dihydrogen phosphate, is considered an acid. It can donate a proton (H⁺) in aqueous solutions, which is a characteristic behavior of acids. In the context of acid-base chemistry, it can act as a weak acid and can also participate in reactions as a conjugate base when it accepts a proton to form H₃PO₄.