Rhod-2, Triammonium Salt from Biotium, Inc.

Membrane-impermeant calcium indicator that can be loaded into cells via microinjection or scrape loading. 

• K_d: 1 uM
• λ _Ex/λ _Em (low or high [Ca² ]) = 556nm/576nm
• ε (556 nm) = 80,000 M^-1cm^-1
• Orange red solid soluble in DMSO and water (pH >6)
• Store at 4°C and protect from light, especially in solution
• C₄₀H₅₁N₇O₁₁
• MW: 806