Direct Yellow 118

Preparation

3-Aminobenzenesulfonic acid diazo, and (2-Methoxyphenylamino)methanesulfonic acid coupling, then the water with sulfonic acid base, compounds (A);7-Aminonaphthalene-1,3-disulfonic acid diazo, and a coupling m-Toluidine, compound (B). Then will molecules of the A and B mixture to light gasification.

Properties and Applications

yellow. Used for paper color.