349-89-3 4-11-00-00114 (Beilstein Handbook Reference) 4-Chlorobenzenesulfonyl fluoride 4-Chlorophenylsulfonyl fluoride BRN 2091507 Benzenesulfonyl fluoride, 4-chloro- (9CI) Benzenesulfonyl fluoride, p-chloro- NSC 12521 p-Chlorobenzenesulfonyl fluoride