荧光探针材料，在碱性条件下有强烈的绿色荧光,广泛应用于荧光分析、示踪染料、 PH 指示剂及合成羧基荧光素的衍生物等。 细胞内PH探针。 Fluorescent probe material, have a strong green fluorescence under an alkaline condition, widely used in the fluorescence analysis, the tracer dye, pH indicator and synthetic derivatives of the carboxyl fluorescein. Intracellular pH probe.Its derivatives such as 2′,7′-bis (2-carboxyethyl)-5(6)-carboxyfluorescein are used to measure changes in intracellular pH (pHi) and processes such as dendrimer aggregation and absorption.