The chemical Chlorophenol red has a designated molecular formula of C19H12Cl2O5S and a molecular weight of 423.260 g/mol. Synonyms may include: Chlorphenol Red, Chlorphenolsulfonphthalein, Dichlorophenolsulfonephthalein, EINECS 224-619-2, NSC 7828 (ChemID).