123301-42-8 27459-85-4 3',3''-Dichlorophenolsulfonphthalein 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis(2-chlorophenol) S,S-dioxide 4430-20-0 CHLOROPHENOL RED Chlorphenol Red Chlorphenolsulfonphthalein Dichlorophenolsulfonephthalein EINECS 224-619-2 NSC 7828 Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-chloro- Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2-chloro-, S,S-dioxide (8CI)(9CI)