Eosin Y (C.I. 45380) for microscopy

Empirical formula C₂₀H₆Br₄Na₂O₅
Molar mass (M) 691,86 g/mol
Melting point (mp)295-296 °C
Oplosbaarheid: 300 g/l (H₂O, 20 °C)
WGK 1
CAS No.[17372-87-1]
EG-Nr. 241-409-6

Eosin Y is a slightly acid fluorescent dye, which stains cytoplasm red. It is soluble in alcohol and water (usual concentrations: 0.5 - 2.0 %). Manifold use, e.g. for hematoxylin-eosin (H&E) staining, spore staining etc.

Excitation maximum: 534 nm
Emission maximum: 544 nm