Poly(pyromellitic dianhydride-co-4,4′-oxydianiline), amic acid solution
LS711105
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![Poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt]](https://resource.alfa-chemistry.com/structure/219957-04-7.gif)
