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(Acid Red 51, Erythrosin extra Bluish; Eosin J; Iodeosin B; Pyrosin B) C20H6O5I4Na2 F.W. 879.87 CAS #16423-68-0 Solubility: 10.0% Water; 5.0% Alcohol; 7.0% Cellosolve; 8.25% Glycol; 0.0% Xylene.