Synonyms: 4,4-Bis-(chlorosulfonyl)-biphenyl ether; (Diphenyl ether)-4,4-disulphonyl chloride; 4,4-Oxybis(benzenesulphonyl chloride); P,P-Oxybisbenzenesulfonyl chloride; 4,4′-Oxybisbenzenesulfonyl Chloride; OBSC; 4,4'-Oxybis(benzenesulfonyl Chloride); 4,4'-Oxybis(benzene-1-sulphonyl) dichloride; `