Synonyms: 2-Pyrazoline,3-(p-chlorophenyl)-1-[p-(N,N-dimethyltauryl)phenyl]- (7CI,8CI);1-[4-(2-Dimethylaminoethylsulfonyl)phenyl]-3-(4-chlorophenyl)-4,5-dihydro-1H-pyrazole;2-[[4-[3-(4-Chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]phenyl]sulfonyl]-N,N-dimethylethanamine;3-(4-Chlorophenyl)-1-[4-[[2-(dimethylamino)ethyl]sulfonyl]phenyl]-4,5-dihydro-1H-pyrazole;C.I. 505105; C.I. Fluorescent Brightener 386; Fluorescent Brightener 386;N,N-Dimethyl-2-[3-(4-chlorophenyl)-4,5-dihydropyrazol-1-ylphenylsulfonyl]ethylamine