Phenolphthalein (Biochemistry Grade)

Phenolphthalein is a chemical compound commonly used as an acid-base indicator in biochemistry and analytical chemistry. It is a white or pale-yellow crystalline powder that is soluble in alcohol, ether, and benzene but is insoluble in water.

In its acidic form, phenolphthalein is colorless, but when the pH of the solution reaches 8.2, it turns pink or red due to the formation of the anionic form. This makes it useful in titrations to determine the endpoint of an acid-base reaction.

Phenolphthalein is also used as a laxative in medicine, although this use has been discontinued in some countries due to its potential carcinogenic properties. It has also been used as a component in certain plastics and dyes.

Biochemistry grade phenolphthalein is of a higher purity than regular grade phenolphthalein, and is free from impurities that may interfere with biochemistry experiments. It is typically used in assays to detect enzyme activity, pH changes, and protein precipitation. It is important to handle phenolphthalein with care, as it may be harmful if ingested or if it comes into contact with the eyes or skin.

• Acid-base indicator in titrations to determine the endpoint of an acid-base reaction

• Used in biochemistry assays to detect enzyme activity, pH changes, and protein precipitation

• Component in certain plastics and dyes

• Laxative in medicine (although this use has been discontinued in some countries due to its potential carcinogenic properties)