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Phenolphthalein Solution, 1% in alcohol
Product Code: PHPH1
Phenolphthalein C20H14O4 is an organic compound used as an acid-base indicator. This compound dissolves poorly in water, and therefore it is typically prepared using alcohol as a solvent.
The indicator has a visual transition interval that is colorless at pH 8.0, pink at 8.5 and red at pH 10.0 .