There isn't just one "other name" for aqueous hydrogen phosphate, as the name depends on which specific hydrogen phosphate you're referring to. Here's why:

* Hydrogen phosphate is a general term for a phosphate ion (PO₄³⁻) with one or more hydrogen ions (H⁺) attached.

* Aqueous means dissolved in water.

Here are some possible "other names" depending on the specific hydrogen phosphate:

* Monohydrogen phosphate (HPO₄²⁻) in water is also called hydrogen phosphate ion.

* Dihydrogen phosphate (H₂PO₄⁻) in water is also called dihydrogen phosphate ion.

Important Note: The term "hydrogen phosphate" often refers to the monohydrogen phosphate ion (HPO₄²⁻).

To be more precise, you should specify which hydrogen phosphate you're interested in.