CAS Registry Number

CAS 28718-90-3 — DAPI (4,6-Diamidino-2-phenylindole dihydrochloride)

DAPI (4,6-Diamidino-2-phenylindole dihydrochloride) is a fluorescent stain widely used in molecular biology to bind strongly to DNA, enabling visualization under UV light for applications like cell cycle analysis, chromosome mapping, and fluorescence microscopy. This high-affinity dye is a white to off-white crystalline powder with a CAS number of 28718-90-3, molecular formula C16H17Cl2N5, and molecular weight of 350.25. Store between 2–8 °C, and handle with caution—it carries a **Warning** signal word. Molekula supplies DAPI from research to bulk quantities with full documentation and ISO 9001:2015 traceability.