Specification Product Name 4', 5' DIBROMOFLUORESCEIN Synonyms Solvent Red 72 CAS NO. 596-03-2 C.I. NO. 45370 Molecular Formula C20H12O5Br2 Molecular Weight 490.12 Appearance Orange Powder Structure     Tests    Limits Dye Content - ~95% Melting Point - 270-275 Deg. C (lit.) Solubility 10 mg/ml, 0.5N NH4OH (heat) - Clear yellow to slightly dark Orange solution         REVISED: 1-1-2012