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(Phenolsulfonphthalein) Formula: C19H14O5S Formula Weight: 354.38 CAS #: 143-74-8 A standard indicator for preparing buffers, pH range 6.4-8.2.
(Phenolsulfonphthalein Sodium Salt) A standard indicator for preparing buffers, pH range 6.8-8.2. Formula: C19H13NaO5S Formula Weight: 376.37 CAS #: 34487-61-1