Fluorescein hexylamine can be coupled to activated carboxy groups or sulfonyl chlorides.  This product could be used as a direct replacement to fluorescein cadaverine. &lamba; Ex/&lamba; Em(pH9) = 493/517 nm Yellow solid soluble in DMSO, DMF, or pH>6.5 buffers Store at 4°C and protect from light C29H27F3N2O8 MW: 588.54