C20H12O5

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  fluorescein \fluo`res"ce*in\, fluoresceine \fluo`res"ce*ine\,
  fluorescein \flu`o*res"ce*["i]n\, n. (Chem.)
     A yellowish red, crystalline substance, {C20H12O5}, produced
     by heating together phthalic anhydride and resorcin; -- so
     called, from the very brilliant yellowish green fluorescence
     of its alkaline solutions. It has acid properties, and its


     salts of the alkalies are known to the trade under the name
     of {uranin}.
  
     Syn: fluorescein, fluorescent dye, resorcinolphthalein.
          [1913 Webster]