विभिन्न व्यापारिक नामों के तहत कई तैयारी में उपयोग किया जाने वाला एक रेचक; कमजोर एसिड और मजबूत आधारों से जुड़े शीर्षकों में एक एसिड-बेस सूचक के रूप में भी प्रयोग किया जाता है क्योंकि यह उच्च क्षारीयता और पीएच 8 से नीचे रंगहीन पर लाल रंग का होता है

phenolphthalein's Usage Examples:

phenolphthalein indicator and the end-point color change is from pink to colorless.

In the second group, we may notice the application of litmus, methyl orange or phenolphthalein in alkalimetry, when the acid or alkaline character of the solution commands the colour which it exhibits; starch paste, which forms a blue compound with free iodine in iodometry; potassium chromate, which forms red silver chromate after all the hydrochloric acid is precipitated in solutions of chlorides; and in the estimation of ferric compounds by potassium bichromate, the indicator, potassium ferricyanide, is placed in drops on a porcelain plate, and the end of the reaction is shown by the absence of a blue coloration when a drop of the test solution is brought into contact with it.

The pH curve for the strong acid - weak base titration shows that phenolphthalein is not a suitable indicator but methyl orange is fine.

phenolphthalein changes color exactly where you want it to.

phenolphthalein solution remains clear where concrete is carbonated and turns pink where concrete is still alkaline.

phenolphthalein phosphate (PPP) can be obtained from Sigma - catalog no.

Phenolphthalein, III.

Phenolphthalein >>

phenolphthalein's Meaning':

a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8

Synonyms:

laxative, acid-base indicator,

Antonyms:

costive,