Synonyms: 3,3-Sulfonyldianiline; 3,3-sulphonyldianiline; di(3-aminophenyl) sulphone; 3,3-Diaminodiphenyl sulfone; 3,3-Diaminodiphenyl sulphone; 3-Aminophenyl sulphone~Bis(3-aminophenyl) sulphone~3,3-Sulphonyldianiline; 3-Amino Diphenyl Sulfone; 3,3_-Diaminodiphenylsulfone = DDS; 3,3'-Diamino Diphenyl Sulphone; 3,3'-Sulfonyldianiline; 3,3'-sulphonyldianiline; 3,3'-DDS