Molecular formula: C36H42N3BF4O4, Molecular weight: 667.54, Appearance: dark blue solid, Solubility: very poorly soluble in water (0.19 mM = 127 mg/L), good in polar (DMSO, DMF) and chlorinated (DCM, chloroform) organic solvents; Amine-reactive red emitting fluorescent dye for the labeling of proteins/peptides and amino-oligonucleotides. For the labeling of sensitive proteins, use water-soluble sulfo-Cyanine5 NHS ester.