Properties(C20H14O4) of Phenolphthalein
Various properties of Phenolphthalein are added in the table below,
|
Feature |
Phenolphthalein |
|---|---|
|
IUPAC Name |
3,3-bis(4-Hydroxyphenyl)-2-Benzofuran-1-one |
|
Appearance |
White to yellowish-white or pale orange fine crystalline powder |
|
Solubility |
Slightly soluble in water, readily soluble in alcohol |
|
Weak acid |
Phenolphthalein is a weak acid |
|
Melting point |
258-263°C |
|
Density |
1.277 g/cm³ |
|
Synthesis |
Phenolphthalein is synthesized by condensing phthalic anhydride with two equivalents of phenol under acidic conditions |
|
pKa |
Phenolphthalein has a pKa of 9.1, indicating that it is a weak acid |
Acid-Base Indicator Property
Phenolphthalein is a weak acid that can lose H+ ions in solution, and its different forms in aqueous solution depend on the pH, enabling it to function as an acid-base indicator.
Phenolphthalein – C20H14O4
Phenolphthalein (C20H14O4) is an organic chemical compound often used as an indicator in acid-base titrations. It is slightly soluble in water and usually is dissolved in alcohol in experiments. It is a weak acid and belongs to the phthalein dyes class. Phenolphthalein is colorless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
In this article, we will look into What is Phenolphthalein, Phenolphthalein Formula, Phenolphthalein Structure, Uses of Phenolphthalein, and others in detail.
Table of Content
- What is Phenolphthalein?
- Properties(C20H14O4) of Phenolphthalein
- Phenolphthalein Test
- Uses of Phenolphthalein