聚[1-[4-(3-카르복시-4-히드록시벤젠偶질소)벤젠磺酰아미노]-1，2-에틸二基나트륨염]

Poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1，2-ethanediyl，sodium salt technical grade