Kd: 1 uM &lamba; Ex/&lamba; 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 C40H39K3N4O11 MW: 869 Kd: 1 uM d &lamba; Ex/&lamba; Em (low or high [Ca2 ]) = 556nm/576nm ExEm2 ε (556 nm) = 80,000 M-1cm-1. -1-1 Orange red solid soluble in DMSO and water (pH >6) Store at 4°C and protect from light, especially in solution C40H39K3N4O11 40393411 MW: 869