Synthesis of dibromo-p-methyl-methylsulfonazois described and its color reactions with calcium,strontium, barium,lanthanum, cerium and lead invarious acid media have been studied.

• 新显色剂二溴对甲基偶氮甲磺的合成方法，并研究了该试剂在磷酸、盐酸、硝酸介质中与钙、锶、钡、镧、铈铅的显色反应。