1155-51-7 4,4'-Dithiobenzoic acid 4,4'-Dithiobis[benzoic acid] Benzoic acid, 4,4'-dithiobis- Benzoic acid, 4,4'-dithiodi- Bis(4-carboxyphenyl) disulfide Bis(p-carboxyphenyl) disulfide NSC210281 p,p'-Dithiodi(benzoic acid)