Potassium Hydrogen Phthalate AR 500g

Potassium Hydrogen Phthalate AR 500g

Potassium Hydrogen Phthalate AR (Analytical Reagent) grade is a high-purity acidic salt compound primarily used as a primary standard and calibration agent in analytical chemistry. 

Potassium Hydrogen Phthalate (KHP) AR (Analytical Reagent) in a 500g package is primarily used as a high-purity primary standard in analytical chemistry and laboratory applications. 

Potassium Hydrogen Phthalate AR 500g

Key Uses

• Acid-Base Titration Standardization: Used to determine the exact concentration (molarity) of alkaline solutions like sodium hydroxide (NaOH). It is ideal because it is a stable, non-hygroscopic solid that is easy to weigh accurately. DUBI CHEM +2
• pH Meter Calibration: Acts as a secondary standard or buffer component (with a pH of around 4.0) to calibrate and check the accuracy of pH meters. 
• Total Organic Carbon (TOC) Testing: Utilised as a standard test substance to measure organic carbon levels in water and environmental samples. 
• Buffer Preparation: Used in chemical solutions to maintain a stable pH range, typically around pH 4.0. Wikipedia
• Educational & Research Demonstrations: Employed in academic chemistry labs to teach students about acid-base reactions, stoichiometry, solubility, and safety

Why AR Grade is Preferred

• High Purity: Typically maintains a purity level of 99.9–100.1% with very low trace impurities (such as heavy metals, chlorides, and sulfates). 
• Low Hygroscopicity: Does not readily absorb atmospheric moisture, allowing for accurate and consistent mass measurements on an analytical balance. 
• Chemical Stability: Remains stable under normal laboratory storage conditions

Potassium Hydrogen Phthalate AR 500g