The best replacement for phenolphthalein is methyl orange.

The best alternatives to phenolphthalein are rated as following:
★★★★★  methyl orange
★★★★  methyl red
★★  phenol red
★  red cabbage
★  bromophenol blue
★  bromothymol blue

Your alternative for phenolphthalein is not listed? Suggest!
Speaking about phenolphthalein, one probably shouldn't forget about naoh.

Other search terms related to phenolphthalein and their ratings are:
★★★★★ naoh
★★★★★ sodium hydroxide
★★★ sodium carbonate
hcl and naoh
You have in mind a companion for phenolphthalein and it is not yet here? Propose!



Google Trends

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phenolphthalein
methyl orange
methyl red