The Amazing Spider-Man Vol. 1 (1963-1998) #173

Plot

The Molten Man is dying! And he's going out in a blaze of glory...literally! When Mark Raxton's final attempt to cure his condition fails, he holes up in the top floor of a pharmaceutical building and demands to see his stepsister Liz Allan! Bravely Liz enters the building and so does the Amazing Spider-Man! As the Molten Man and the wall-crawler trade blows, the building becomes a raging inferno on the verge of collapse! Will anyone get out alive? An anguish-filled ending! (mycomicshop.com)