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4,4'-Dihydroxybiphenyl-3,3'-dicarboxylic acid is a synthetic material intermediate that is a useful reagent in the synthesis of 4-hydroxypyridine derivatives. It can be used as a reaction component in the synthesis of drugs and other organic compounds for the preparation of complex compounds such as 2-aminopyridine and 2-aminopyrimidine. It can also be used as synthetic polymers and other multifunctional scaffolds.