Description
Specifications Table
Product Name – Potassium hydrogen phthalate, 99.99%, acidimetric standard
Quantity/Pack Size – 100GR, 500GR, 2.5KG
Form – Crystalline powder
Grade – 99.99% (Primary Standard)
Application – Acid-base titration, pH calibration, analytical chemistry
Product Overview
Potassium hydrogen phthalate (KHP), with a purity of 99.99%, is a high-grade acidimetric standard widely recognized for its stability and precision in analytical applications. This crystalline powder serves as a primary standard in volumetric analysis due to its non-hygroscopic nature, ensuring consistent and reliable results without moisture absorption. Its well-defined molecular weight (204.22 g/mol) and high solubility in water make it ideal for preparing standard solutions with exact concentrations. The compound’s resistance to atmospheric CO₂ and moisture ensures long-term stability, minimizing errors in titration procedures. As a monobasic acid, it provides a single, sharp endpoint in titrations, enhancing accuracy in acid-base determinations. The 99.99% purity level guarantees minimal impurities, making it suitable for calibration of pH meters and other sensitive analytical instruments. Its low toxicity and ease of handling further contribute to its preference in laboratory settings. Whether used in educational labs or research environments, this KHP standard delivers unmatched consistency for critical analytical workflows.
FAQs
1. What is the shelf life of potassium hydrogen phthalate?
When stored in a tightly sealed container at room temperature, potassium hydrogen phthalate remains stable for 3-5 years without significant degradation.
2. Can this KHP standard be used for pH meter calibration?
Yes, its high purity and stable pH in solution make it suitable for calibrating pH meters, particularly at pH 4.01 when prepared as a 0.05M solution.
3. Is this product compatible with automated titration systems?
Absolutely, its consistent particle size and solubility ensure smooth dissolution and accurate dispensing in automated titration setups.
4. How should I store potassium hydrogen phthalate to maintain its purity?
Store in an airtight container away from direct sunlight and moisture. Avoid exposure to alkaline substances to prevent contamination.
5. What alternatives exist for acidimetric standards?
Sodium carbonate and benzoic acid are common alternatives, though KHP is preferred for its higher stability and non-hygroscopic properties.
