Chemical Information Catelog Number: R01-0012 Product Name: BDP TR NHS ester CAS Number: 150152-65-1 Molecular Formula: C25H18BF2N3O5S Molecular Weight: 521.30 Purity: HPLC-MS (95%), UV-Vis Product Specification Appearance: dark blue-black crystals ε, L⋅mol-1⋅cm-1: 69000 Fluorescence quantum Yield: 0.9 Excitation Maximum (nm): 589 Emission Maximum (nm): 616BDP TR is a bright and photostable borondipyrromethene dye, which is especially suitable for microscopy applications. The dye has a long excited state lifetime, and is therefore is useful for fluorescence polarization assays. Its large two-photon cross section makes this dye useful for two-photon spectroscopy. This NHS ester is an amine-reactive form of the dye.