SO4 is not a complete molecular compound. It represents the sulfate ion (SO₄²⁻), which is a polyatomic ion with a charge of -2.

To form a molecular compound, the sulfate ion would need to combine with another ion of opposite charge, like a metal cation. For example:

* Na₂SO₄ is sodium sulfate

* CaSO₄ is calcium sulfate

Let me know if you want to know the name of a specific compound containing the sulfate ion.