(4-phosphonophenyl)phosphonic acid

1,4-phenylenebisphosphonic acid;
Phosphonic acid,p-phenylenedi;
4-phosphonophenylphosphonic acid;
1,4-phenyldiphosphonic acid;
1,4-Benzenebisphosphonic acid;
Phenylene-1,4-diphosphonic acid;
p-Phenylenediphosphonic acid;
1,4-benzenediphosphonic acid;
1,4-phenylenediphosphonic acid;