What is Phenolphthalein?

Phenolphthalein is a chemical indicator, it is a weak acid and belongs to the class of dyes known as phthalein dyes. It is synthesized from phthalic anhydride and two equivalents of phenol under acidic conditions. Phenolphthalein is also known for its use as a pH indicator and laboratory reagent. It is also used as a laxative, although its use in this capacity has decreased due to safety concerns.

Phenolphthalein in Acid

Phenolphthalein in acid is colourless.

Phenolphthalein in Base

Phenolphthalein in base turns to pink color.

Phenolphthalein(C₂₀H₁₄O₄) Formula

Phenolphthalein is a chemical compound whichhas 20 carbon atom, 14 hydrogen atom, and 4 oxygen atom, and it has the formula,

Chemical Formula of Phenophthalein: C₂₀H₁₄O₄

Phenolphthalein(C₂₀H₁₄O₄) Structure

Phenolphthalein has a complex structure and it has three benzene ring and its structure is added in the image below,

• It contains a phenyl group, which is an aromatic hydrocarbon, bonded to a phthalate group, which is a plasticizer.

• Phenolphthalein molecule has three hexagonal structures, one pentagonal structure, two alcoholic groups, and one ketone group.

• Carbon, hydrogen, and oxygen chains form the structure of Phenolphthalein.

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.