α-naphtholphthalein
Sign in to saveα-Naphtholphthalein (C28H18O4) is a phthalein dye used as a pH indicator with a visual transition from colorless/reddish to greenish blue at pH 7.3–8.7.
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α-Naphtholphthalein (C28H18O4) is a phthalein dye used as a pH indicator with a visual transition from colorless/reddish to greenish blue at pH 7.3–8.7.
==References==
Excerpted from Wikipedia’s “α-naphtholphthalein” article, available under the CC BY-SA 4.0 licence.