Name:C.I.Acid Yellow 73,C.I.45350C.I.Acid Yellow 73,C.I.45350,CAS 518-47-8,376.27,C20H10Na2O5,Acid Fluoresceine,Akacid Sodium Fluoresceine,Fluorescein GDCMolecular Formula:C20H10Na2O5Molecular Weight: 376.27CAS Registry Number:518-47-8 Properties and Applications: brilliant yellow. Soluble in water and ethanol (with strong green fluorescent), water-soluble good. In strong sulfuric acid with weak for fluorescence yellow, it will be diluted with yellow precipitation. Its water solution and sodium hydroxide with dark green fluorescence for brunet solution. Mainly used for sea of target that fluorescent, facilitate aerial reconnaissance search. And can use significantly for the exploration of fluorescent groundwater. Can also be used for medicine and cosmetics shading, rarely used for silk printing and dyeing things.