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Definition of Phenolphthalein

Phenolphthalein: A compound used as a laboratory reagent and acid-base indicator and also used in over-the-counter (OTC) laxative preparations.

Phenolphthalein may be a carcinogen (cancer-causing agent). Feeding of phenolphthalein caused cancer in multiple organs in multiple species of experimental animals. The US government in 2000 classified phenolphthalein as "reasonably anticipated to be a human carcinogen."

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=13444
Last Editorial Review: 6/14/2012

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