Sulfuric acid, a diprotic acid, is the most widely used acid in industry, and is also the most-produced industrial chemical in the world.
sʌlfjˈʊɹɹɪk ˈæsɪd, ɐ dɪpɹˈɑːɾɪk ˈæsɪd, ɪz ðə mˈoʊst wˈaɪdli jˈuːzd ˈæsɪd ɪn ˈɪndʌstɹi, ænd ɪz ˈɔːlsoʊ ðə mˈoʊstpɹədˈuːst ɪndˈʌstɹɪəl kˈɛmɪkəl ɪnðə wˈɜːld.