A useful fluorescent orange dye is {TAIL ~ 14H anthrathioxanthene} 14 one, commercially available as {HEAD ~ C.I. Solvent Orange} 63 from Hoescht Celanese, and having the following chemical structure: 
A useful fluorescent orange dye is { TAIL ~ 14H anthrathioxanthene } 14 one , commercially available as { HEAD ~ C.I. Solvent Orange } 63 from Hoescht Celanese , and having the following chemical structure :
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH