Phenolphthalein

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Where is Phenolphthalein found?

Phenolphthalein turns colorless in acid solutions and pink in basic solutions. It is used to perform presumptive blood tests in the Kastle-Meyer test, as well as in laxatives. It is found in toys as a component of disappearing inks or disappearing dye.

How can you avoid contact with Phenolphthalein?

Avoid products that list any of the following names in the ingredients:

• 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
• 3,3-Bis(4-hydroxyphenyl)phthalide
• 3,3-Bis(p-hydroxyphenyl)phthalide
• 5-18-04-00188 (Beilstein Handbook Reference)
• AI3-09081
• BRN 0284423
• CCRIS 6266
• Chocolax
• Colax
• Correctol
• Dihydroxyphthalophenone
• EINECS 201-004-7
• Espotabs
• Euchessina
• Evac-Q-Kit
• Evac-Q-Kwik
• Evac-Q-Tabs
• Evac-U-Gen
• Evac-V-Lax
• Ex-Lax
• Feen-A-Mint Gum
• FemiLax
• Fenolftalein
• Fenolftalein [Czech]
• Fenolftaleina
• Fenolftaleina [INN-Spanish]
• HSDB 4161
• Koprol
• Lax-Pills
• Laxin
• Laxogen
• Lilo
• Medilax
• NCI-C55798
• NSC 10464
• Phenolax
• Phenolphtaleine
• Phenolphtaleine [INN-French]
• Phenolphthalein
• Phenolphthaleinum
• Phenolphthaleinum [INN-Latin]
• Phthalide 3,3,-bis(p-hydroxyphenyl)-
• Phthalimetten
• Phthalin
• Purga
• Purgen
• Purgophen
• Spulmako-lax
• Trilax
• alpha-(p-Hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidene)-o-
• toluic acid
• alpha-Di(p-hydroxyphenyl)phthalide

What are some products that may contain Phenolphthalein?

A clinician's point of view.

Additional resources and links for Phenolphthalein.

To submit resources or links, please fill out the submission form at the top of this page.

For additional information about products that might contain Phenolphthalein, visit the Consumer Product Information Database. These lists are brief and provide just a few examples. They are not comprehensive. Product formulations also change frequently. Read product labels carefully and talk to your doctor if you have any questions. These are general guidelines. Talk to your doctor for more specific instructions.