CAS Registry Number

CAS 17372-87-1 — Eosin Y (C.I. 45380)

Eosin Y (C.I. 45380) is a synthetic fluorescent dye belonging to the xanthene family, widely used as a biological stain in microscopy, histology, and microbiology for differentiating cellular structures. It is also employed in food coloring, ink production, and as a photosensitizer in photodynamic therapy. This chemical has a CAS number of 17372-87-1, a molecular formula of C20H6Br4Na2O5, and a molecular weight of 691.85. It should be stored at ambient conditions, with a signal word of Warning indicating moderate hazard. Molekula supplies Eosin Y from research to bulk quantities with full documentation and ISO 9001:2015 traceability.