Eosin Y (yellowish) (C.I. 45380), Certistain® Dry Dye Used for Counterstaining, Merck KGaA (CAT#: STEM-L-3415-LKN)

Eosin Y (C.I. 45380) is a CERTISTAIN dry dye for microscopy that is often used as a counterstain, vizualising proteins, connective tissues, fibers and keratin in sample material of human origin. It can be used for the preparation of the commonly used aqueous or alcoholic Eosin Y staining solutions. This staining solution will mostly be used for routine staining in the hematoxylin-eosin staining process (H&E).

Form: solid
Potency:>2000 mg/kg LD50, oral (Rat)
Composition: Dye, ≥85% spectrophotometric assay
pH: 9.2 (20 °C, 10 g/L in H2O)
MP: 295-296 °C
Solubility: 300 g/L
Bulk density: 710 kg/m3
εmax: 1200-1400 at 515-518 nm in water at 0.005 g/L
InChI key: SEACYXSIPDVVMV-UHFFFAOYSA-L
Storage conditions: +5°C to +30°C.

Eosin B (bluish) (C.I.45400), Certistain® Dry Dye Used for Counterstaining, Merck KGaA (CAT#: STEM-L-3414-LKN)