5-(&6)-CARBOXY-2',7'-DICHLOROF

类似于羧基荧光素，但是具有更低的pKa。用于更多酸性环境下检测pH。

5-(and-6)-carboxy-2′,7′-dichlorofluorescein is similar to carboxyfluorescein (51013), but has lower pK_a. It is useful for detecting pH in more acidic environment. Also see the membrane-permeant compound dichlorofluorescein diacetate (51016).

λ_Exλ_Em = 504/529 nm

• pK_a = 4.8
• ε= 90,000
• Orange solid soluble in DMSO and pH>6 buffers
• Store at room temperature and protect from light, especially in solution
• C₂₁H₁₀Cl₂O₇
• MW: 445
• [111843-78-8]