8-Undecyl-7H,8H,9H-dinaphtho[1,8-bc:1',8'-hi]xanthene-7,9-dione is an intermediate in the synthesis of Tribenzo[de,h,kl]naphtho[1,2,3,4-rst]pentaphene (T767600), which is used in nanotechnology in the optical sensing of current dynamics in LED devices.