Frequently Asked Questions on Phenolphthalein

What is Phenolphthalein Used for?

Phenolphthalein is used as a pH indicator in laboratory settings and is commonly employed in acid-base titrations.

How does Phenolphthalein Change Color in Acid-Base Titration?

Phenolphthalein turns colorless in acidic solutions and pink in basic solutions during acid-base titration, making it a visual indicator of the endpoint.

What is Clinical Use of Phenolphthalein?

In clinical practice, Phenolphthalein was once used as a laxative, but its use has declined due to safety concerns and potential carcinogenicity.

What is Kastle-Meyer Test?

Kastle-Meyer test is a forensic test used to detect the presence of blood by using Phenolphthalein as an indicator.

What is pH Range of Phenolphthalein?

Phenolphthalein has a pH range of approximately 8.2 to 10.0, making it suitable for indicating the endpoint of titrations involving strong bases and weak acids.

What is Colour of Phenolphthalein?

Colour of Phenolphthalein in basic soluion is pink and in case of acidic solution phenolphthalein is colorless.

Is Phenolphthalein harmful for Health?

Exposure to phenolphthalein causes multiple carcinogenic effects, including neoplasm in kidney, adrenal medulla, hematopoietic system, and ovary in rats.

Is Phenolphthalein Acidic or Basic?

Phenolphthalein, is a weak acid with chemical formula of 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.