Phenolphthalein |
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| Ap-La-Day; Ex-Lax; Feen-A-Mint; Key Brand of Phenolphthalein; Laxatone; Laxettes; Manesco Brand of Phenolphthalein; Mentholatum Brand of Phenolphthalein; Modane; Novartis Brand of Phenolphthalein; Schering-Plough Brand of Phenolphthalein; Thalinol | |
| An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic. | |