Potassium Acid Phthalate

Potassium Acid phthalate, also known as potassium hydrogen phthalate or KHP, is a white crystalline solid commonly used as a primary standard for acid-base titrations. It is the potassium salt of phthalic acid with acidic properties.

Chemical Formula: C₈H₅KO₄

Appearance: Colorless to white crystalline powder or crystals

Uses:

• Analytical Chemistry: In analytical chemistry, potassium acid phthalate serves as a reference standard for determining the concentration of strong bases and acids in titrimetric analyses. Utilized in the standardization of acid and base solutions, as well as in the calibration of analytical instruments.

• Education and Research: It is commonly used in educational laboratories for teaching acid-base titration techniques and principles. In research laboratories for  experimental procedures, it is used as a for accurate titrations and pH measurements.

• Quality Control: Industries involved in the production of pharmaceuticals, food, and beverages may use potassium acid phthalate as a reference standard for quality control purposes.