The product of aniline reacting with H₂SO₄ at high temperature (453-473 K) is:
Aniline with concentrated H₂SO₄ at 453-473 K forms sulphanilic acid (p-aminobenzene sulphonic acid) via sulphonation, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Preparation - Hoffmann Bromamide and Reduction of Nitro Compounds