Eosin Y

image [ 17372‐87‐1 ] C 20 H 6 Br 4 Na 2 O 5 (MW 647.89) InChI = 1S/C20H8Br4O5.2Na/c21‐11‐5‐9‐13(7‐3‐1‐2‐4‐8(7)20(27)28)10‐6‐12(22)17(26)15(24)19(10)29‐18(9)14(23)16(11)25;;/h1‐6,25H,(H,27,28);;/q;2*+1/p‐2 InChIKey = SEACYXSIPDVVMV‐UHFFFAOYSA‐L (dye; photosensitizer; photooxidation; singlet oxygen production; alkyne reduction; diazonium decomposition; alkyl halide reduction; biological stain/marker) Alternative Name(s) : 2′,4′,5′,7′‐tetrabromofluorescein, acid red 87, bromofluorescein . Physical Data : mp 295.5 °C, d =1.018 g·cm −3 , pH=7–10. Solubility : methanol, ethanol, water, ethers, pyridine, DMSO, acetonitrile, DCM, DCE. Form Supplied in : light red to red powder in glass bottle. Handling, Storage, and Precautions : no special precautions required, store at room temperature. Purification : the powder was washed with NaOH and recrystallized from ethanol.