This dye can be used as a low pH indicator similar 5-and-6-Carboxy-2'7'-dichlorofluorescein, and is also useful as a general green fluorescent label. Carboxy-2',7'-dichlorofluorescein is significantly more photostable than carboxyfluorescein.
<ul>
<li>&lamba;_Ex/&lamba;_Em = 504/529 nm (pH 8)</li>
<li>&epsilon; = 90,000</li>
<li>Yellow solid soluble in DMSO, DMF or basic water (pH &gt;7)</li>
<li>Store at  4°C and protect from light</li>
<li>C₂₁H₁₀Cl₂O₇</li>
<li>MW: 445</li>
</ul>