Formula: C₂₇H₂₈Br₂O₅S Formula Weight: 624.39 CAS Number: 76-59-5 Synonym(s): 3,3`-Dibromethylmolsulfonphthalein

Formula: C₁₉H₁₀Br₄O₅S Formula Weight: 669.97 CAS Number: 115-39-9 Synonym(s): 3`,3``,5`,5``-tetrabromo-m-cresolsulfonephthalein

Formula: C₂₇H₂₇Br₂O₅SNa Formula Weight: 646.37 CAS Number: 34722-90-2 Synonym(s): 3,3`-Dibromothylmolsulfonphthalein Sodium Salt