Eosin Y disodium  (Synonyms: Acid Red 87)

Eosin Y disodium (Acid Red 87) is a soluble acid red dye molecule. Eosin Y disodium has a wide application in organic synthesis as a photoredox catalyst^[1].

osin Y disodium is widely applied as a photoredox catalyst in organic synthesis^[1].
Eosin Y disodium finds application in cell staining, as a pH indicator, as an indicator in the analytical halide determination by Fajans and as a dye pigment, e.g. in lip sticks^[1].
Eosin Y disodium is the most widely used counterstain in routine staining of histological tissue sections (erythrocytes, collagen, epithelial cells, etc.)^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

691.86

C₂₀H₆Br₄Na₂O₅

17372-87-1

Solid

Brown to reddish brown

O=C1OC2(C3=CC(Br)=C(C(Br)=C3OC4=C(C(O[Na])=C(C=C42)Br)Br)O[Na])C5=C1C=CC=C5

Room temperature in continental US; may vary elsewhere.

Store at room temperature, keep dry and cool

• [1]. Hari DP, König B. Synthetic applications of eosin Y in photoredox catalysis. Chem Commun (Camb). 2014;50(51):6688-6699.  [Content Brief]

  [2]. Poulios, I., et al. (2003). Photooxidation of eosin Y in the presence of semiconducting oxides. Applied Catalysis B: Environmental, 41(4), 345-355.