5(6)-CFDA, SE is a useful fluorescent tracer that can passivley diffuse into cells and covalently label intracellular proteins, resulting in long-term cell labeling. The reagent itself is colorless and nonfluorescent but becomes brightly green fluorescent once it is hydrolyzed by intracellular esterases. The labeling has been shown to be stable to formaldehyde or glutaldehyde fixation condition.

• l_ex\l_em(of hydrolysis product at pH 7) = 495/519 nm
• White solid soluble in DMSO or DMF
• Store at -20?C and protect from light
• C₂₉H₁₉NO₁₁
• Mwt: 557 ! [150347-59-4]