Bromophenol blue is used as a pH indicator, a color marker, and a dye. It can be prepared by slowly adding excess bromine to a hot solution of phenolsulfonphthalein in glacial acetic acid.
Formula: C19H10Br4O5S
Subtotal: KSh142,840.00
Phenolphthalein is a chemical compound with the formula C₂₀H₁₄O₄ and is often written as “HIn” or “phph” in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and red in basic solutions.
Formula: C20H14O4
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