– BODIPY493/503 methyl bromide, a BODIPY dye, is a small molecule with strong ultraviolet absorption, a sharp fluorescence peak, and high quantum yield. It exhibits relative insensitivity to environmental polarity and pH while maintaining stability under various physiological conditions. The structural asymmetry of BODIPY allows for diverse structural derivatives. BODIPY lipid droplet dyes effectively permeate the cell membrane, localize polar lipids, and specifically stain lipid droplets, making them suitable for labeling both live and fixed cells [1]. Maximum excitation/emission wavelength: 493/503 nm [1].