2 Molecular weight: 511 Abs = 464 nm (before photolysis) Abs/Em = 510/610 nm (following photolysis and covalent attachment to DNA/RNA) Dark red solid soluble in water Store at 4°C and protect from light at all times Molecular weight: 511 Abs = 464 nm (before photolysis) Abs/Em = 510/610 nm (following photolysis and covalent attachment to DNA/RNA) Dark red solid soluble in water Store at 4°C and protect from light at all times