Our azide-free CF® Dye Annexin V Conjugates are supplied as lyophilized solids with no azide or other preservatives that might be incompatible with live cell imaging or in vivo studies. After dissolving in buffer, the conjugates can be added to cell culture medium for live cell staining. Near-infrared CF® Dye Annexin V Conjugates (CF®680 through CF®800) are compatible with NIR small animal in vivo imaging.