Rose Bengal

image [636‐69‐9] C 20 H 2 Cl 4 I 4 Na 2 O 5 (MW 1017.64) InChI = 1S/C20H4Cl4I4O5.2Na/c21‐10‐8(9(20(31)32)11(22)13(24)12(10)23)7‐3‐1‐5(25)16(29)14(27)18(3)33‐19‐4(7)2‐6(26)17(30)15(19)28;;/h1‐2,29H,(H,31,32);;/q;2*+1/p‐2 InChIKey = UWBXIFCTIZXXLS‐UHFFFAOYSA‐L Alternative Names : Rose Bengal disodium salt, Rose Bengal sodium salt, acid red 94, Bengal Rose, 4,5,6,7‐tetrachloro‐2′,4′,5′,7′‐tetraiodofluorescein disodium salt. Physical Data : mp > 300 °C, flash point 412.1 °C, bp 757.8 °C at 760 mmHg, absorption 548 nm. Form Supplied in : red to brown solid in glass bottle. Solubility : soluble in water, DMSO. Handling, Storage, and Precautions : tightly closed, dry, store at room temperature. Purification : the powder was washed with NaOH and recrystallized from ethanol.