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Phenolphthalein has been used for over a century as a laxative, but ... to contain blood, commonly known as the Kastle-Meyer test.



Phenolphthalein is an organic compound (C20H14O4) used as an acid-base indicator. The compound is colorless in acidic solution and pinkish in basic ...

What is Phenolphthalein? (with pictures) - wiseGEEK


Jun 21, 2016 ... Phenolphthalein is a mild acid that can be used for medical and scientific purposes. When used in medicine, this compound is most commonly ...

Acid-Base Indicators - Chemistry Department - Elmhurst College


The most common method to get an idea about the pH of solution is to use an acid base ... A properly selected acid-base indicator can be used to visually " indicate" the ... Phenolphthalein is an indicator of acids (colorless) and bases ( pink).

Phenolphthalein Laxatives and Risk of Cancer


Subsequently, most phenolphthalein-containing laxatives were voluntarily ... other than phenolphthalein [or anthraquinones, which were not commonly used in ...

Phenolphthalein pH Indicator, 30mL (1 oz.) - The Science Company


This 30ml (one ounce) bottle of phenolphthalein is commonly used as an acid- base indicator, 8.2 (colorless) - 10 (red). It comes packed in a convenient squeeze ...

BBC - GCSE Bitesize Science - Titrations : Revision


Three indicators are commonly used to show whether a solution is acidic or alkaline: litmus ... Phenolphthalein changes colour sharply at about pH 8. For most ...

Why do we use phenolphthalein as an indicator in titration? - Quora


Nov 25, 2015 ... Well, you may have used phenolphthalein as the indicator in a particular ... Some other commonly employed indicators are bromothymol blue, ...

6. Acid-Base Indicators - Chemwiki


Aug 21, 2015 ... Methyl orange is one of the indicators commonly used in titrations. ... Phenolphthalein is another commonly used indicator for titrations, and is ...

Titration Problems


This webpage describes a procedure called titration, which can be used to find the ... In our example, phenolphthalein, which is a commonly used acid‑base ...

More Info

phenolphthalein | C20H14O4 - PubChem


phenolphthalein | C20H14O4 | CID 4764 - structure, chemical names, ... Phenolphthalein is an organic compound used as a laboratory reagent and pH indicator. ...... Available in white or yellow forms; the monosodium salt is the most common ...

acid-base indicators - Chemguide


Methyl orange is one of the indicators commonly used in titrations. ... Phenolphthalein is another commonly used indicator for titrations, and is another weak acid ...

Phenolphthalein-NaOH Kinetics Phenolphthalein is one of the most ...


Phenolphthalein is one of the most common acid-base indicators used to determine ... end of an acid-base titration, the pink phenolphthalein color fades if the ...