S Acid83-64-731 % similar 3-[(Ethylphenylamino)methyl]benzenesulfonic acid101-11-131 % similar N-Phenyl-2-naphthylamine135-88-630 % similar 4-Chlorobenzenesulfonic acid98-66-830 % similar 5-Amino-2-(phenylamino)benzenesulfonic acid91-30-530 % similar Aniline-2,4-disulfonic acid137-51-930 % similar 2-Amino-1,4-benzenedisulfonic acid98-44-230 % similar