Molar mass 418.45 g/mol | ||
 | ||
Appearance Colorless-reddish to blue-green solid | ||
α-Naphtholphthalein (C28H18O4) is a pH indicator with a visual transition from colorless/reddish to greenish blue at pH 7.3–8.7.
References
Naphtholphthalein Wikipedia(Text) CC BY-SA