Chemical Information Catelog Number: R01-0006 Product Name: BDP 581/591 NHS ester Molecular Formula: C26H22N3BF2O4 Molecular Weight: 489.28 Purity: NMR 1H, HPLC-MS (95%) Solubility: good in DMF, DMSO, DCM CAS Number: 654651-21-5 Product Specification Appearance: dark colored solid ε, L⋅mol-1⋅cm-1: 104000 Fluorescence quantum Yield: 0.83 Storage Conditions: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate. Excitation Maximum (nm): 585 Emission Maximum (nm): 594BDP 581/591 is a borondipyrromethene dye that has relatively long fluorescence lifetime and two photon excitation cross section. It is useful for fluorescence polarization assays. Due to the presence of a diene system, it can react with reactive oxygen species (ROS) with a change of fluorescence. This is the NHS ester derivative for the conjugation with primary and secondary amine groups of proteins, peptides, and other molecules.