Chemical Information Catelog Number: R05-0002 Product Name: BDP 581/591 hydrazide Molecular Formula: C22H22N4BClF2O Molecular Weight: 442.7 Purity: NMR 1H, HPLC-MS (95%) Solubility: good in DMF, DMSO, alcohols Related CAS: 2183473-40-5 (hydrochloride); 2183473-39-2 (inner salt) Product Specification Appearance: dark colored solid ε, L⋅mol-1⋅cm-1: 104000 Fluorescence quantum Yield: 0.83 Storage Conditions: 24 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 hydrazide is a carbonyl reactive dye. BDP 581/591 is a borondipyrromethene fluorophore with bright emission, and oustanding photostability.Aldehyde and ketone groups that can be labeled can be obtained by oxidation of 1,2-diol groups in sugars; they are also present in proteins after oxidative stress, and in many small molecules.