1. Iodine Tincture Decolorized Colorless White Clear Iodo YODO Blanco (GERMA) 4.5 out of 5 stars 543

2. In general, the Acid Alizarin Violet N forms were decolorized more rapidly than the Direct Red 83 forms, the presence of copper protected the dyes from the continuation of indirect oxidation, and methoxylation reduced the first-order rate constant, but it did not protect the azo bond from continued indirect oxidation as was the case with copper.