EZSolution DAF-2 500UG. EZSolution DAF-2, CAS number: 205391-01-1, Molecular Formula: C20H14N2O5, MW: 362. 34, Purity: greater than or equal to 95%, Appearance: Liquid, Synonym: 4, 5-Diaminofluorescein 2-G(3, G6-Gdihydroxy-G4, G5-Gdiamino-G9H-Gxanthen-G9-Gyl)-Gbenzoic acid, Size: 500UG