H3PO4 is called phosphoric acid.
According to the provided reference, a YouTube video titled "How to write the name for H3PO4 (Phosphoric acid)," the compound H3PO4 is specifically identified as phosphoric acid. The video explicitly states, "That leaves us with phosphoric acid as the name for h3po4." This makes it clear that the chemical formula H3PO4 corresponds to the name phosphoric acid.
